- Kit Includes: (1) Chuck, (1) C-Ring Cone Assembly Tool, (1) C-Ring Assembly Push Tool, (1) C-Ring, (1) Thick Grooved Metal Washer, (1) Thin Metal Washer, (1) Thick Rubber Washer, (4) Chuck Balls
- Full .401″ Round Twist-Lock Chuck Replacement
- Exclusively compatible with 3771-20
- Snap ring pliers, flat head screwdriver and a hammer (not included)







