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a thermal process resulting in a porous tool coating
They feature a unique cutting edge geometry in conjunction with high temperature brazing to ensure reliable and accurate drilling in multiple hole applications
Long lasting – high wear resistance
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
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
US$ 22.00
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US$ 12.00
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