Sizes are 1/16 in. to 1/4 in. by 64ths.
This set is made from M 42 steel which features 8% COBALT for hardness that will give you a long service life.
Manufactured with real cobalt alloy steel!
Cobalt bits drill all your exotic metals.
Jobbers length bits in the set with precision ground cutting edges.
Guaranteed to meet or exceed all the Federal Government specifications for the Industrial Rating Standards of drill bits.
This is a very good set of drill bits for an incredible price!