IRWIN Unibit 3 8 in 13 Step Drill Bit Hammer Drills Collection Name Picket Type Border Collection Name Picket Type Border Edge Type N A Style N A Theme N A Design N A Material Glass Stone Type N A Shape Hexagonal Mosaic Yes Mosaic Pattern Honeycomb Finish Glossy Surface Type Smooth Installation Type Thinset mortar Tile Shape Hexagonal ADA Compliant Yes Chemical Resistant Yes Commercial Residential Commercial Residential Actual Thickness (Millimeters) 8 Actual Width (Inches) 10 Can be installed as a single mount or 3 hole mount with cover plate included Sub Brand Unibit Brand Model Compatibility Universal Number of Hole Sizes 12 Diameters of Holes Drilled 1 8 in to 1 2 in Step Size 1 8 in Shank Size 3 8 in Shank Type Hex Material Black oxide coated HSS Set Individual Set Package Quantity 3 Warranty None CA Residents: Prop 65 Warning(s) Yes wood and laminates 3 flatted shank won't slip in chuck Speed point tip for fast starting Laser marked sizes won't wear off with use Unibit #3 is engineered with M35 cobalt steel for maximum life when drilling in tough steel Unibit #3 cobalt contains a 3 8 in hex shank and contains 9 hole sizes 1 4 in 3 4 in (1 16 in steps) Unibit #1 contains a 1 4 in hex shank and will drill 13 hole sizes 1 8 in 1 2 in (1 32 in steps) Unibit #4 contains a 3 8 in hex shank and will drill 12 hole sizes 3 16 7 8 in (1 16 in steps)