SPEEDHAMMER Plus concrete and masonry wall drills are for demanding users who only want the best. Thanks to the innovative spiral blade, they have 20% more power than the most common stone drill bits and remove drilling dust and debris super fast. The blades are made from chromium-vanadium steel, which gives them the best possible breaking strength. Fits all hammer drills with SDS+ attachments 2-blade tip Blade geometry ensures 20% faster drilling The short blade tip means the drill hole doesn't clog and dust and debris come out efficiently Chromium-vanadium steel structure