Trend IT/2031557 203 BK machine bit 30 mm diameter77mm overall lng. right handTungsten carbide tipped boring bit with centre point, two cutting edges and 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=30 mmOL=77 mmD2=10x26 mmL=75 mmRotation=Right hand