Laser welded segment design laser welded to barrel for maximum strength and “top wave” design for fast, easy dry drilling into concrete with rebar. Stay sharp teeth designed to self-sharpen as you drill. Segment design, outer TORNADO bevel design, inside straight slot and barrel core slot design for fast grit removal and easy dust flow. 250mm drilling depth (no need for extension or bit change). Adapter available for SDS Plus and SDS Max drills. Sizes carefully selected for the needs of the professional Tradesman - ideal for use in all construction trades and particularly for use by installation engineers such as electricians, Plumbers, HVAC and professional drilling contractors where versatility is a must. Concrete, reinforced concrete, masonry block, brick and other hard materials.