Features: * Complete the drilling, countersinking and countersinking process. * 1/4" hex shank can be used with power drills and quick change chucks. * Adjustable stop collar allows you to position the screw head flush with the surface or drill bit. * Countersink drills will drill a pilot hole and countersink or counter-hole for screws in the step. Countersink to drive the screw head flush or slightly below the surface. Specifications: Product Name: Countersink Drill Bit Material: HCS Color: Gray, Orange (as shown) Optional Size: 2.88, 38, 3.2 8, 3.5 8, 2.8 10, 3 10, 3.2 10, 3.5 10 Shank: 6.35mm(1/4" ) Hex Suitable for: wood drilling, counterbore. Quantity: 1 pc Package includes: 1 drill Note: 1. Transition: 1cm = 10mm = 0.39 inch.2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.