About this item

Premium Materials: High quality alloy blades, waterproof and anti-corrosion, hardened HSS steel blades sharper and more durable Good Design: Adjustable limits of the round shank for a wider range of applications, stable clamping effect and easy to use Removable and Adjustable: Use the included hex wrench to remove the screw and adjust the length of the countersunk hole to adjust the drilling length of screws of different lengths Practical: HSS spiral flute drill bit set with a center drill will quickly discharge chips from the hole It can effectively prevent the accumulation of debris retention and improve drilling efficiency. Multi-Purpose: Countersink drill bits suitable for home or professional woodworking, used on wood, plastic, PVC, fiberboard, particleboard, plywood, rubber and more.