Set comprising a Quick Chuck and three sizes of Drill Bit Guides for the accurate fitting of hinges. Drill bit guides for No.6, No.8 and No.10 screws. Self-centring drills for the accurate drilling of pilot holes for fittings such as hinges to ensure exact alignment . Drill bit guides can easily be dismantled for cleaning and are supplied with a HSS drill bits. Specifications • Shank Diameter: 1/4 hex • Dia Imperial: 5/64 to 9/64 • Pack Qty: 4 piece Contents: 1 x Quick chuck 1 x Drill bit guide 5/64" 1 x Drill bit guide 7/64" 1 x Drill bit guide 9/64