52806 SATA 6PCS?HSS?COBALT?DRILL SET

◆This product is made of M35 high-speed steel containing 5% cobalt◆The drill bit is formed by grinding and with precision dimension◆135° double clearance angle has the auto-centering function to prevent slippage during drilling◆Fine thread technology is adopted to effectively increase the cutting speed and prolong the service life◆Innovative 123° apex angle design, effective increasing the cutting speed