17piece HSS selfcentering lock hinge drill bit set for precise hinge holes and reliable results accuracy drilling: delivers precise holes to ensure clean hinge alignment on doors, cabinets, and furniture Efficient centering: automatic positioning center allows accurate hole placement without manual alignment Wide compatibility: 6 mm shank diameter fits most electric drills, making it suitable for professionals and hobbyists Time saving design: dualsided construction automatically clears sawdust from hole sides, reducing interruptions Durable material: made from speed steel (HSS) for long lasting performance What you get: a 17piece drill bit set Applications: ideal for hinge installation on wooden doors and cabinets, mounting hardware on furniture, and DIY hinge bore projects in wood and composite materials Specifications: shank diameter 6 mm; material HSS; number of pieces 17; compatible with most electric drills