General description Countersink drill bit set designed for creating pilot holes and countersinks simultaneously. This versatile set is suitable for various materials including wood, plastic, PVC, plywood, and rubber. Technical specifications Manufactured from 4241 HSS steel Sizes: Ø2, 2.5, 2.75, 3.25, 3.5mm Model No. CSSET5 Compatibility and accessories Fitted with a 1/4" Hex shank, compatible with any standard sized drill chuck Hex key included for adjusting drill bits to accommodate different length screws