Manufactured to very high tolerances for use on CNC multi boring machines.Highly accurate, fast and cost effective for fitting Ebco hinges.Bores three holes at a time using left hand & right hand carbide cutters.Has a built in dummy rotating spindle at 64 mm to prevent jig from rotating.Two or more jigs can be used in a CNC machine to drill holes for two or more hinges in shutter, wardrobe doors etc. at a time.