FTG USA Adjustable Wood Countersink Drill Bit #6 (9/64"), tapered drill bit with parabolic flute - Adjustable Taper Length Wood Countersink (#6) 9/64" feature the best tapered drill bits 3rd Party Tested HSS M2 Grade 6542, most popular High Speed Steel, has superior properties, including high toughness, wear resistance, and good cutting retention. Logo brand is laser printed on each countersink shank making it easier to differentiate this quality brand from others. Counter-bore size 3/8", Plug size 3/8". Super sharp, very durable, easy to use, and built to perform well in both hard and soft woods. Drill, countersink, and counter-bore in 1 step. Top quality material #45 Carbon Steel adjustable four-cutter counter bore chamfer angle 82 degree, attachment that cuts fast and clears chips quickly for fast, smooth countersinking applications. The counter bore feature attaches flats on shank with 2 hex screws for a secure fit and can be adjusted for controlled pilot hole depth providing a clean finish for more polished final products. 1 Hex Key (Allen Wrench) and 1 Depth Stop Collar included. Replacement Tapered Drill Bits FTG Parabolic Flute are available on FTG USA Brand store on this website. This product is designed in Bloomfield, New Jersey by Fair Trade Group USA LLC and Professionally manufactured in China at FTG USA specifications. Packaging set combination/design protected by US Copyright Office