Makita B-35097 Impact Gold Ultra-Magnetic Torsion Insert Bit Holder Rare earth Neodymium magnet is 2x stronger than magnets in standard insert bit holders Two-piece design is engineered to allow the torsion technology to fully activate High-quality steel engineered for use with impact drivers Designed exclusively for high-torque impact drivers Ideal for use with Makita Impact GOLD Insert Bits (sold separately)