diff --git a/package-lock.json b/package-lock.json
index 35fc94d..0e7fbef 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,13 +1,17 @@
 {
   "name": "@typescript-package/collection",
-  "version": "0.0.1",
+  "version": "0.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@typescript-package/collection",
-      "version": "0.0.1",
+      "version": "0.1.0",
       "funding": [
+        {
+          "type": "stripe",
+          "url": "https://donate.stripe.com/dR614hfDZcJE3wAcMM"
+        },
         {
           "type": "individual",
           "url": "https://checkout.revolut.com/pay/048b10a3-0e10-42c8-a917-e3e9cb4c8e29"
@@ -15,13 +19,13 @@
       ],
       "license": "MIT",
       "peerDependencies": {
-        "@typedly/collection": "^1.1.0"
+        "@typedly/collection": "^2.0.0"
       }
     },
     "node_modules/@typedly/collection": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/@typedly/collection/-/collection-1.1.0.tgz",
-      "integrity": "sha512-Xt3F2LUhWi0wxIUBFEr05ZiafJRhO2Rw6Ee7kVoJCZEh7CeWFldNejd3HzogVezK9rvo8yhBBnphwlEYlE9eSg==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@typedly/collection/-/collection-2.0.0.tgz",
+      "integrity": "sha512-g+B2EWAPN2c4icthittXxADTZ3G6PSri5F1qNpZOteZfZCnPCRs4WcRif37ewzDAS7lUiTuyIXHueyRTMld14A==",
       "funding": [
         {
           "type": "stripe",
diff --git a/package.json b/package.json
index d6f81f8..7d5b7e4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@typescript-package/collection",
-  "version": "0.0.1",
+  "version": "0.1.0",
   "author": "wwwdev.io <dev@wwwdev.io>",
   "description": "A lightweight TypeScript library for data collection.",
   "license": "MIT",
@@ -9,7 +9,7 @@
     "registry": "https://registry.npmjs.org"
   },
   "peerDependencies": {
-    "@typedly/collection": "^1.1.0"
+    "@typedly/collection": "^2.0.0"
   },
   "scripts": {
     "prepublishOnly": "npm run pkg && npm run clean",
diff --git a/src/adapter/lib/set.adapter.ts b/src/adapter/lib/set.adapter.ts
index 17f2e47..bee6742 100644
--- a/src/adapter/lib/set.adapter.ts
+++ b/src/adapter/lib/set.adapter.ts
@@ -4,72 +4,56 @@ import { CollectionAdapter } from '@typedly/collection';
  * @description The Set collection adapter.
  * @export
  * @class SetAdapter
- * @template Element The type of the elements in the Set.
- * @template [Type=Set<Element>] The type of the underlying Set collection.
- * @implements {CollectionAdapter<Element, Type>}
+ * @template E The type of the elements in the Set.
+ * @template [T=Set<E>] The type of the underlying Set collection.
+ * @implements {CollectionAdapter<E, T>}
  */
 export class SetAdapter<
-  Element,
-  Type = Set<Element>
-> implements CollectionAdapter<Element, Type> {
+  E,
+  T extends Set<E> = Set<E>
+> implements CollectionAdapter<E, T> {
   public version: string = '1.0.0';
-
   get [Symbol.toStringTag](): string {
     return 'SetAdapter';
   }
-
-  get [Symbol.iterator](): Iterator<Element> {
-    return (this.#collection as unknown as Set<Element>)[Symbol.iterator]();
+  [Symbol.iterator](): Iterator<E> {
+    return this.#collection[Symbol.iterator]();
   }
-
-
-  protected get collection(): Type {
+  protected get collection(): T {
     return this.#collection;
   }
-
   public get size(): number {
-    return (this.collection as unknown as Set<Element>).size;
+    return this.collection.size;
   }
-
-  public get value(): Type {
-    return this.collection as unknown as Type;
+  public get value(): T {
+    return this.collection as unknown as T;
   }
-
-  #collection: Type;
-
-  constructor(...collection: Element[]) {
-    this.#collection = new Set(collection) as Type;
+  #collection: T;
+  constructor(...collection: E[]) {
+    this.#collection = new Set(collection) as T;
   }
-
-  public add(element: Element): this {
-    return (this.collection as unknown as Set<Element>).add(element), this;
+  public add(...element: E[]): this {
+    return element.forEach(e => this.collection.add(e)), this;
   }
-
   public clear(): this {
-    return (this.collection as unknown as Set<Element>).clear(), this;
+    return this.collection.clear(), this;
   }
-
   public destroy(): this {
     return this.clear(), (this.#collection = null as any), this;
   }
-
-  public delete(element: Element): boolean {
-    return (this.collection as unknown as Set<Element>).delete(element);
+  public delete(...element: E[]): boolean {
+    return element.every(e => this.collection.delete(e));
   }
-
-  public forEach(callbackfn: (element: Element, element2: Element, collection: CollectionAdapter<Element, Type>) => void, thisArg?: any): this {
-    return (this.collection as unknown as Set<Element>).forEach((value, value2) => callbackfn.call(thisArg, value, value2, this as any)), this;
+  public forEach(callbackfn: (element: E, element2: E, collection: CollectionAdapter<E, T>) => void, thisArg?: any): this {
+    return this.collection.forEach((value, value2) => callbackfn.call(thisArg, value, value2, this as any)), this;
   }
-
-  public has(element: Element): boolean {
-    return (this.collection as unknown as Set<Element>).has(element);
+  public has(...element: E[]): boolean {
+    return element.every(e => this.collection.has(e));
   }
-
   public lock(): this {
     return Object.freeze(this.collection), this;
   }
-
-  public set(value: Type): this {
+  public set(value: T): this {
     return (this.#collection = value), this;
   }
 }
diff --git a/src/core/lib/collection.base.ts b/src/core/lib/collection.base.ts
index 1fa34b2..85e0f42 100644
--- a/src/core/lib/collection.base.ts
+++ b/src/core/lib/collection.base.ts
@@ -16,16 +16,7 @@ export abstract class CollectionBase<
   E,
   T,
   A extends CollectionAdapter<E, T>
-> extends CollectionCore<E, T> {
-
-  public get [Symbol.toStringTag](): string {
-    return 'Collection';
-  }
-
-  public get [Symbol.iterator](): Iterator<E> {
-    return (this.#adapter.value as unknown as any)[Symbol.iterator]();
-  }
-
+> extends CollectionCore<E, T, A> {
   /**
    * @description The protected getter and setter for the adapter.
    * @protected
@@ -35,51 +26,20 @@ export abstract class CollectionBase<
     return this.#adapter;
   }
 
-  public get size() {
-    return this.#adapter.size;
-  }
-
-  public get value() {
-    return this.#adapter.value;
-  }
-
   #adapter: A;
 
   constructor(
-    adapter: new (...args: any[]) => A,
+    adapter: new (...elements: E[]) => A,
     ...elements: E[]
   ) {
     super();
     this.#adapter = new adapter(...elements) as unknown as A;
   }
 
-  public add(...element: E[]): this {
-    return element.forEach(e => this.#adapter.add(e)), this;
-  }
-  public clear(): this {
-    return this.#adapter.clear(), this;
-  }
-  public clone(): CollectionCore<E, T> {
-    return new (this.constructor as any)(this.#adapter.value, this.#adapter);
-  }
-  public destroy(): this {
-    return this.clear(),
+  public override destroy(): this {
+    return super.clear(),
+      super.destroy(),
       this.#adapter = null as any,
       this;
   }
-  public delete(...element: E[]): boolean {
-    return element.every(e => this.#adapter.delete(e));
-  }
-  public forEach(callbackfn: (element: E, element2: E, collection: CollectionCore<E, T>) => void, thisArg?: any): this {
-    return this.#adapter.forEach(callbackfn as any, thisArg), this;
-  }
-  public has(element: E): boolean {
-    return this.#adapter.has(element);
-  }
-  public lock(): this {
-    return this.#adapter.lock?.(), this;
-  }
-  public set(value: T): this {
-    return this.#adapter.set(value), this;
-  }
 }
diff --git a/src/core/lib/collection.core.ts b/src/core/lib/collection.core.ts
index 8baa6d4..c96e4c1 100644
--- a/src/core/lib/collection.core.ts
+++ b/src/core/lib/collection.core.ts
@@ -1,25 +1,58 @@
 // Interface.
-import { CollectionShape } from '@typedly/collection';
+import { CollectionAdapter, CollectionShape } from '@typedly/collection';
 /**
  * @description The core abstract class for `Type` collections of elements `Element` type.
  * @export
  * @abstract
  * @class CollectionCore
- * @template Element type in collection.
- * @template Type of the collection.
- * @implements {CollectionShape<Element, Type>}
+ * @template E type in collection.
+ * @template T of the collection.
+ * @template {CollectionAdapter<E, T>} A Adapter type.
+ * @implements {CollectionShape<E, T>}
  */
-export abstract class CollectionCore<Element, Type> implements CollectionShape<Element, Type> {
-  abstract get [Symbol.toStringTag](): string;
-  abstract get [Symbol.iterator](): Iterator<Element>;
-  abstract value: Type;
-  abstract add(...element: Element[]): this;
-  abstract clear(): this;
-  abstract delete(...element: Element[]): boolean;
-  abstract destroy(): this;
-  abstract forEach(callbackfn: (element: Element, element2: Element, collection: CollectionShape<Element, Type>) => void, thisArg?: any): void;
-  abstract has(element: Element): boolean;
-  abstract lock(): this;
-  abstract set(value: Type): this;
-  abstract readonly size: number;
+export abstract class CollectionCore<
+  E,
+  T,
+  A extends CollectionAdapter<E, T>
+> implements CollectionShape<E, T> {
+  get [Symbol.toStringTag](): string {
+    return 'Collection';
+  }
+
+  [Symbol.iterator](): Iterator<E> {
+    return this.adapter[Symbol.iterator]();
+  }
+
+  protected abstract get adapter(): A
+
+  public get size(): number {
+    return this.adapter.size;
+  }
+  public get value(): T {
+    return this.adapter.value;
+  }
+  public add(...element: E[]): this {
+    return this.adapter.add(...element), this;
+  }
+  public clear(): this {
+    return this.adapter.clear(), this;
+  }
+  public delete(...element: E[]): boolean {
+    return this.adapter.delete(...element);
+  }
+  public destroy(): this {
+    return this.adapter.destroy?.(), this;
+  }
+  public forEach(callbackfn: (element: E, element2: E, collection: CollectionShape<E, T>) => void, thisArg?: any): void {
+    return this.adapter.forEach(callbackfn as any, thisArg);
+  }
+  public has(...element: E[]): boolean {
+    return this.adapter.has(...element);
+  }
+  public lock(): this {
+    return this.adapter.lock?.(), this;
+  }
+  public set(value: T): this {
+    return this.adapter.set(value), this;
+  }
 }
diff --git a/src/lib/collection.class.ts b/src/lib/collection.class.ts
index 5d703bc..9df938b 100644
--- a/src/lib/collection.class.ts
+++ b/src/lib/collection.class.ts
@@ -7,12 +7,12 @@ import { CollectionAdapter } from "@typedly/collection";
  * @export
  * @class Collection
  * @template E The type of elements in the collection.
- * @template {new (...args: any[]) => CollectionAdapter<E, any>} A The type of the adapter.
+ * @template {new (...elements: E[]) => CollectionAdapter<E, any>} A The type of the adapter.
  * @extends {CollectionBase<E, any, InstanceType<A>>}
  */
 export class Collection<
   E,
-  A extends new (...args: any[]) => CollectionAdapter<E, any>
+  A extends new (...elements: E[]) => CollectionAdapter<E, any>
 > extends CollectionBase<E, any, InstanceType<A>> {
   constructor(adapter: A, ...elements: E[]) {
     super(adapter as any, ...elements);
diff --git a/src/test/collection.spec.ts b/src/test/collection.spec.ts
index a45dfc7..e320bd1 100644
--- a/src/test/collection.spec.ts
+++ b/src/test/collection.spec.ts
@@ -8,6 +8,10 @@ collection.add(27, 29, 31, 33);
 // Deletes.
 collection.delete(29, 31);
 
+for (const element of collection) {
+  console.log(`element: `, element);
+}
+
 console.log(`size: `, collection.size); // Output: 5
 
 describe("Collection SetAdapter", () => {