kwb Drill Bits & Parts Concrete twist drill bit set 610607 - KWB 044300, The kwb 044300 Concrete Twist Drill Bit Set includes five chromium molybdenum steel bits sized from 3 mm to 8 mm with a cylinder shank. These durable drill bits are suitable for drilling into masonry, stone, and brickwork. Ideal for construction and renovation projects, the set provides reliable performance for both professional and DIY applications. kwb 044300 Concrete Twist Drill Bit set 5-piece Hammer-proof ISO 5468