4pcs Countersink Bit

This product is a 4-piece woodworking countersink drill bit set designed to drill pilot holes and create a beveled recess in one step, allowing screw heads to sit flush with the wood surface. The set includes bits in sizes 3mm, 3.5mm, 4mm, and 4.5mm, each featuring a standard hex shank for quick-change compatibility with power drills. It also comes with a hex key (Allen wrench), which is used to adjust the drilling depth or replace the bits by loosening the set screw on the adjustable collar.