Milwaukee 3-flat secure-grip hammer-drill bits drill faster and last longer than others on the market. The 3-flat secure-grip shank fits in all 1/2 inch three-jaw hammer-drill chucks and maintains unyielding bit hold with heavy torsional loads. Designed especially for conical anchor, concrete screw, nail-in and hollow wall anchor applications, the bit provides superior performance through its reinforced flute geometry and carbide tip design. Milwaukee offers a complete range of 3-flat secure-grip hammer-drill bits in diameters from 1/8 inch to 1 inch with lengths up to 18 inch. Reduced slipping: 3-Flat Secure-Grip™ shank holds the bit firmly in the chuckFaster drilling: Reinforced flute geometry increases bit stabilityLonger life: Carbide tips extend performance in masonry applicationsConvenience: Delivers superior quality in a select range of bitsFlute is designed for fast removal of concrete dust from drill holeDesigned to fit in all 1/2 in. 3-jaw hammer-drill chucks