FTG Adjustable Wood Countersink drill bit for screws #8 with 3 Piece Replacement tapered drill bit size 11/64", by far the most popular High-Speed Steel, Grade 6542 with 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. Counterbore size 3/8", Plug size 3/8", pre-drill screws size 8.. Super sharp, exceptionally durable, easy to use, and built to perform well in both hard and soft woods. Drill, countersink and counterbore 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. This product is designed in New Jersey, and professionally manufactured in China at FTG USA specifications. Packaging protected by US Copyright Office.