TREND SNAPPY SNAPDBGSET CENTRING GUIDE DRILL BIT SET PACK OF 3 Set comprising a Quick Chuck & three sizes of Drill Bit Guides for the accurate fitting of hinges Drill bit guides for No 6 No 8 & No 10 screws Selfcentring drills for the accurate drilling of pilot holes for fittings such as hinges to ensure exact alignment p Drill bit guides can easily be dismantled for cleaning & are supplied with a HSS drill bits