Safe and Secure: Each countersink drill bit in this set is securely fastened to the hexagonal shank with a pin, ensuring it never come loose. Designed for wood sizes #4(7/64inch), #6(9/64inch), #8(11/64inch), #10(3/16inch), and #12(7/32inch), this set allows you to drill, countersink, and sink holes in . Precise Drilling Every Time: Get perfectly tapered holes with our wood drill bit set, featuring an 82-degree countersink chamfer for smooth countersinking. The adjustable design makes it ideal for woodworking, ensuring professional results every time. Extend Life with Replacement Bits: Our replacement wood countersink tapered drill bits are to use, extending the life of your drill bits. With a pointed tip and wide slot, these bits quickly drill clean pilot holes, ensuring a snug fit for screws, perfect for both hardwood and softwood applications. High-Quality Steel: Made from High Speed Steel. flute shape enhances chip for smoother, more efficient drilling,, Manufacturer: Ounfhtrttk