228-SD Stepped cone drill bit for very thin sheet metal.Titanium-nitride coating with a hardened surface allowsthe product to last 4 to 5 times longer than a regular drill bit.This treatm...
228-SD Stepped cone drill bit for very thin sheet metal.Titanium-nitride coating with a hardened surface allowsthe product to last 4 to 5 times longer than a regular drill bit.This treatm...