20PC Quick Change Bit Set

Size: 8pcs hex shank drill.

Zinc alloy: 1/16", 5/64", 3/32", 7/64", 1/8", 5/32",3/16", 7/32"

8pcs 50mm bit：Slotted: 3/16", 1/4";  Phillips:PH1, PH2; Star:T15,T20; 6-hex: 1/8", 3/16"

3pcs Nut driver, sanding blast: 1/4", 5/16", 3/8"

1pc Copper quick coupler