About this item To Prevent Scratches On The Surface: Get precise and reliable results every time with it. Its built-in stopper prevents scratches on the wood surface, while the predetermined depth ensures stable and accurate drilling. High Quality Material: These countersink drill bits are made of high quality alloy steel. Offer superior cutting power and durable. High hardness and wear resistance, convenient and quick to drill a hole. High Efficiency Design: Quickly and accurately drill a smooth hole. Better in centering and no skid. It can effectively prevent the accumulation of debris retention, improve the drilling efficiency. Widely Application: Perfect for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber, etc. Widely used suitable for DIY, home and general building or engineering using, etc. Different Sizes: Our Countersink drill bit sets include 5 kinds of sizes: 2.8 mm, 3.0 mm, 3.2mm, 3.5mm, 4mm. Very suitable for using to multi size wood hole drilling. › See more product details