Multistep, HSS, cylindrical shank with three-surface grind, and through-hole, replaceable drill section 7 mm. Application Usable for soft and stainless steel sheet metal, a wide ange of plastics, Plexiglas, fibreglass, for metals up to 4 mm thick. Essential for mounting and assembly tasks as it can be used in hand-held drills. No pre-drilling necessary; drills directly into solid material without problems. replacement bits
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