Cobalt Jobber Drill Set Imperial: 1/16" - 3/8" x 1/64" Rises | 21pc 66 Drive Links a thermal process resulting in

a thermal process resulting in a porous tool coating

Durable soft grip chemical resistant handles

Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation

Specifically engineered for use in impact drivers these bits are also fully compatible with conventional rotary drills

TiAlN offers higher temperature resistance than TiN

Cobalt Jobber Drill Set Imperial: 1/16" - 3/8" x 1/64" Rises | 21pc 66 Drive Links a thermal process resulting inCobalt Jobber Drills have a Bronze Finish (gold oxide). This metallic brown coloured low temperature temper treatment is used on cobalt tools for identification purposes. Cobalt HSS drills are extremely hard and provide superior performance and increased tool life especially in stainless steel and high tensile steel. Cobalt Jobber Drills Imperial: 1 16" 3 8" x 1 64" Rises 21 Piece Set