Technical data: DRILL SET 190PCS, DIN 338, CYLINDER CHUCK, 1.0/1.5/2.0/2.5/3.2/3.5/4.2/4.5/5.0/5.5/6.0/6.5MMx10PCS. 3.0MMx20PCS. 4.0MMx15PCS. 7.0/7.5/8.0MMx5PCS. 8.5/9.0/9.5/10.0/10.5/11.0/11.5/12.0/12.5/13.0MMx2PCS The YT-44677 set contains 190 HSS drill bits for metal. They are made from a single piece of steel, the working part is titanium coated. Diameter range from 1 mm to 13 mm. **