YATO Step Drill Set 3pcs YT-44731

Titanium coated to increase the lifetime of the drills Manufactured from high speed HSS 4241 steel 3 drill bits with following sizes: 3-4-5-6-7-8-9-10-11-12mm, 4-6-8-10-12mm, 4-6-8-10-12-14-16-18-20mm The edges of the drilled hole remain clean and burr-free automatic centering on rounded and slippery surfaces Quick heat dissipation during drilling in hard materials, 2 spiral chip grooves for efficient dust removal