Tolsen's black & gold HSS drill bit set includes 19 sized drill bits ranging from 1mm-10mm, supplied in a handy carry case.
Each drill bit is coated with Titanium nitride (TiN), giving the gold like colour. This coating increases the hardness of the bit and adds a self-lubricating property. The coating is effective when metal is being drilled, giving clean drill holes and making the drilling effortless.
Tolsen's drill bits have a 130° split point and have a flatted shank on 5mm and above drill bits to improve grip.
Each kit includes the below sized bits: