Ideal for hinges, brackets, joinery, cabinetmaking, etc., and general fastening to timber and thin metal. Undercut heads are ideal for fixing hinges to steel door jambs, flyscreens etc., Hardwoods may require a pilot hole to be pre-drilled to assist the screw in tapping a thread & reducing timber splitting and driving torque. Sheet metal must be pre-drilled. Supplied in a convenient handi-pack