The PTI Hinge Drill Guide Set is designed to provide perfectly aligned screw pilot holes for hinges, handles, drawer slides, and other fittings. With spring-loaded and chamfered tips, these drill guides are made to match countersunk holes for an accurate and professional finish. Brand: PTI For accurately drilled pilot holes using hinge as a template Spring-loaded nose piece ensures correct centring Chamfered tips match countersunk holes perfectly High-speed steel drill bits for durability and precision Standard hex shank for quick change chucks Comes with a storage wallet for easy organisation Sizes included : 2.4mm, 2.8mm, 3.2mm, 3.5mm Suitable for screws : No. 6, 8, 10, 12