"SUPERIOR DESIGN. Matco Exclusive Patented Cobalt Hyper-Step set is made from the strongest material tough enough to drill through the hardest jobs like stainless, grade 8 fasteners, hardened alloys and cast irons","STUBBY LENGTH. Stubby screw machine size which are 1/2 to 2/3 the length of traditional drill bits for increased drill bit rigidity and maximize tight space access","ELIMINATES THE NEED FOR PILOT HOLES. Patented Hyper-Step design in large sizes eliminates the need for up to two pilot holes that traditional drill bits require","INNOVATIVE. The multi-stepped tip acts like a step drill, allowing for laser like holes through sheet metal and prevents walking on curved surfaces","PREVENT FRACTURE. The harder Cobalt drill bit material pairs perfectly with stubby bit lengths to prevent fracture during difficult cordless drilling jobs","ELIMINATES SLIPPAGE. Three-flatted shanks on both sizes below 3/8\" and on the 3/8\" reduced shank sizes up to 1/2\" 17/64" COBALT HYPER-STEP STUBBY DRILL BIT DBCHS17S | Matco Tools