Item Type: Pneumatic Grinder Collet_x000D_ Material: 45# Steel_x000D_ Purpose: Pneumatic Tool Accessories_x000D_ Surface Treatment: Blackening Treatment_x000D_ Colour: Black_x000D_ Model: S40A_x000D_ Applicable Pneumatic Grinder Models: For S40A, for S40-360, for S40-580 1Application: This is a chuck, whch is widely suitable for S40A, for S40?360, for S40?580, etc. pneumatic grinders 23 Jaws: This chuck has 3 jaws, which can provide better contact and stronger grip, you can use with confidence 345# Steel: The chuck is made of 45# steel material, and the surface is blackening to prevent corrosion and rust 4Longer Service Life: This chuck is stronger, has a longer service life, and has good flexibility, practical 5High Clamping Force: Chuck has high clamping force, good holding stability, wear resistance, stable performance1 x Chuck