These new cutters are ideal for installers who need perfectly drilled true holes. Ideal for the quick installation of Tubular Latches, Deadbolts, Concealed Door Closers etc. The range of 4 sizes of ‘Plunging Cutters’ are designed for locks where perfect installation is an issue. Made from High Speed Steel, these very effective 3 point plunging drills are a real bonus for those wanting to solve installation problems.