This set contains a selection of left hand spiral drill bits and screw extractors for removing broken or damaged studs, fasteners, bolts, screws, etc. Constructed from high quality M35 steel with 5% Cobalt for longer life. They give a superior performance even when drilling challenging materials such as stainless steel and high alloy steel. For tough or hard metal drilling such as high tensile and hardened steels, including stainless steel (Cr-Ni) and purpose made acid resistant metals.
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