Trend IT/2031007 203Bk machine bit 15 mm diameter57.5mm overall lng. right handTungsten carbide tipped boring bit with centre point, two spurs. Suitable for drilling hinge holes in natural wood and man-made boards (including paper/plastic coated and veneered). Boring bits have a cylindrical shank with flat and lng. adjusting screw. For use on automatic and point-to-point boring machines.Specification-D=15 mmOL=57.5 mmShank Diameter=10x26 mmL=55.5 mmRotation=Right hand