12pcs Cobalt Drill Bits M35 Twist Drill Bit Straight Jobber Drill Bits
$10.99
by Unique Bargains
1. The M35 drill bit is made of cobalt high speed steel, contain 5% Cobalt, high hardness, fast cutting speed, improve wear resistance, more durable than ordinary high speed steel drill bit. 2. The cobalt drill bit can be used to harden materials.