1/4" Insert Bit with Ribs designed for additional gripping power to screwheads - prevents camout. Among the millions of driver bits produced worldwide each year, only a small percentage reach the high quality standards of Alpha. Alpha's outstanding range of superior quality bits Alpha driver bits are simply superior! We only stock the highest quality driver bits - Superior Head Design, Greater Magnetism and Optimum Hardness. The result? Alpha driver bits show less wear, have a longer service life, experience less cam-out, and provide overall improved operational and economic benefits.