step drill bit with 10 step sizes: 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, 1-3/8 inchTri-flatted shank of step drill fits into drill chuck of power tools securely and avoids slideEASY DRILLING: Two-fluted design provides faster, smoother cutting; Provided with small pressure and the sets can cut through wood, sheet metal, steel and other surfaceshigh speed steel with high capability and durability in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metalMainly used for drilling thin steel within 3mm and it can be completed a one-time processing according to the need to process different diameter holesA drill can alter the use of more than a bit and do not need to replace the drill bit and positioning holes.Weight: 0.3lb APRX.color:goldMaterial:HSSPackage included:1x Step Drill BitNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.