Titanium-Coated Step Drill Set 3pce 3pceOverviewUse for drilling sheet metal up to 3mm thick. 1/4 inch hex shank fitting. Sizes: 1/8 inch-1/2 inch, 3/16 inch-1/2 inch and 1/4 inch-3/4. inch Loops 3 Piece Titanium Coated Step Drill Set/Bits Taper Cone Sheet Metal