9/64''..Guide drill - 9/64''
When you need to drill a screw hole precisely in the centre of a hinge or handle hole you need these Guide drills. They really shine when you are trying to fit hinges to that nice box you are making and don't want off centre screw holes pulling the hinge to one side. The spring loaded guide centres the drill in the countersink and prevents it wandering to one side making sure the hole is central. The drill can easily be replaced with any straight shank drill of the same size.