For pricechoose optionsSelect Option Double End Body Diameter 0.500in Contact Diameter 0.2in Double End Body Diameter 10mm Contact Diameter 6mm Single End Body Diameter 0.375in Contact Diameter 0.2in Single End Body Diameter 10mm Contact Diameter 6mm Quantity Add to Basket Workpieces with straight edges, shoulders, grooves, studs, dowels, centre points and scribed lines can all be quickly and accurately located with this handy tool. Made of tool steel, hardened, ground and lapped.