2GT Belt Clamp Material: made of high quality copper, long service life and excellent performance. Simple To Install: Easy and quick installation, our copper buckle has been pre-pressed, just put the 6mm belt inside and clamp it with pliers, it's very convenient to use. 2GT Belt Buckle Feature: Lightweight and Compact Terminal Parts only fits for 6mm 3D Printer Belt Copper Buckle, wire cable connection terminal; Used for mechanical parts, 3D printer accessories, etc. Package Included: 20pcs Pre-pressed Copper Buckle