Trend IT/2017617 Ditec- thru drill 5 mm diameter57.5mm overall lng. left handTungsten carbide tipped dowel drill with V drill point. Special, high performance, drill suitable for drilling tear free through holes in natural wood and man-made boards (including paper/plastic coated and veneered). Will out perform standard drills by many times due to a special grade carbide, and a new grinding process giving the highest performance. Drills have a cylindrical shank with flat and lng. adjusting screw. For use on automatic and point-to-point boring machines.Specification-D=5 mmCut lng.=27 mmOverall lng.=57.5 mmShank Diameter=10x25 mmRotation=Left hand