Features:Material: Our change chucks are made of high-quality steel materials with wear resistance and long service life.Lightweight Design: This part adopts lightweight material which is very light on your hands. Easy to Use: Just take out the change chuck and use it in your work, a very convenient set for you. Rust Proof: This change chuck adopts high quality material which will avoid rust well.Applications: This change chuck is suitable for Gbh2-26Dfr/Gbh2-28Dfv/Gbh4-32Dfr, an universal part.Specifications:Material: SteelFunctions: Change chuck Application: Gbh2-26Dfr/Gbh2-28Dfv/Gbh4-32DfrSize: Inner Diameter-1.9cm Outer Diameter-2.7cmInstallation method:1. Insert the drill bit into the bayonet and align the short groove with the round steel ball.2. Loosen the collet and press down the drill bit, hear the click, and the installation is completed.3. Pull down when removing. Package List:1 * Electric-Hammer Impact Drill Change Chuck