5PC Inch Size Amber and Black Step Drill Set

Finish: Amber and Black

Shank: Round shank

Size: 1/4-1-3/8; 3/16-7/8; 1/4-3/4; 1/8-1/2; 3/16-1/2

Optional Material: H.H.S.&Carbon steel

Usage:

1. For drilling large holes in thin material and reboring existing holes;

2. Steel sheet and stainless steel from 0.1 to 2mm thick.