Usage Tips:Safe and Secure: Each countersink drill bit in this set is securely fastened to the hexagonal shank with a pin, ensuring it will 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 one step. Extend Life with Replacement Bits: Our replacement wood countersink tapered drill bits are always ready 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. 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 precision woodworking, ensuring professional results every time. High-Quality Steel: Made from High Speed Steel. Wider flute shape enhances chip flow for smoother, more efficient drilling, Colour:Black Material:High Speed Steel Package Contents: 1 x countersink drill bit set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.