Designed for drilling in stainless steel. Highly efficient for construction workers and installers: Long Life. Cylindrical shank compatible with three-jaw drill chucks. For drilling in steel and stainless steel, eg when pre-drilling profiles and beams for anchors, rivets, threads, and fixtures. Scope of delivery: Bosch PRO Stainless Steel HSS-Co Twist Drill Bit, 4 x 43 x 75 mm.