Brand: Malco Products Manufacturer's Part Number: UB1 Part Type: Drill Bits Product Line: Malco Step Drill Bits Summit Racing Part Number: MAL-UB1 UPC: 686046507255 Drill Bit Material: High-speed steel Drill Bit Color: Natural Quantity: Sold individually. Drill Bit Quantity: 1 Drill Bit Style: Step Step Drill Bit Size: 1/8， 5/32， 3/16， 7/32， 1/4， 9/32， 5/16， 11/32， 3/8， 13/32， 7/16， 15/32， 1/2 in. Drill Bit Drive Size: 1/4 in. round Malco Step Drill Bits Malco step drill bits offer a unique double-flute design that ensures the penetration of soft or thin materials at the proper speed. These industrial grade high-speed steel drill bits are heat-treated and tempered to ensure maximum strength for long-wearing， rugged use. And they are completely re-sharpenable. The step drill bits actually deburr as they drill and， with the selection of sizes， you can drill holes from 1/8 in. to 1 in. in sheet metal without burring or deforming stock. They're perfect for use as "hole-opening" reamers or for making round holes from slots or intersecting holes. Get several hole sizes from one bit with Malco step drill bits.