Designed for PRO Double-Ended Impact Bits When you drive screws you want them to sit firmly in the screwdriver bit. The PRO Magnetic Sleeve helps you drive screws with ease. Use the PRO Magnetic Sleeve on your double-ended screwdriver bits to make sure you get a firm hold on screws. Features and Benefits: • Designed for PRO Double-Ended Impact BitsFALSE • For firm hold on screws when driving them with double-ended screwdriver bits • Highly efficient for installers, electricians, metalworkers, and woodworkers