Type 117 Centre punches are manufactured from specially selected steel, hardened and properly tempered. They are well proportioned, nicely finished and have a knurled finger grip. The points are ground at the optimum angle to give maximum service, and the tips are accurately centred. Length: 100mm(4in). The set of five sizes comprises: 1.5mm(1/16in), 2mm(5/64in), 2.5mm(3/32in), 3mm(1/8in) and 4mm(5/32in).