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SST+ Jobber Bit Set by Walter Surface Technologies is an assortment of 29 heavy-duty drilling bits made with a cobalt blend. The exclusive quick shank SST+ drill bit with back tapered body features self-centering split points and spiral design in a fully ground body. Each HSS tool smoothly drills through steel sheets, non-ferrous metal sheets, aluminum, and thin gauge metal sheets with its twist-drilling property. HSS drill bit allows cordless drilling by tightening securely into keyed or keyless chargeable hand tools. The jobber length bits are available in a range of driller sizes, flute length, and shank, quickening the drilling session.