Application: Suitable for 1/4″ DIN ISO 1173-C 6,3 and E 6,3 hexagon insert bits and Wera Series 1 and 4 Design: Rapidaptor rapid-in, rapid-out, rapid-spin, chuck-all, and single-hand technology, with strong permanent magnet Drive: 1/4″ hexagon suitable for power tools with DIN ISO 1173-F 6,3 receiver Wera 1/4'' Magnetic Bit Holder Features: Application: Suitable for 1/4″ DIN ISO 1173-C 6,3 and E 6,3 hexagon insert bits and Wera Series 1 and 4 Design: Rapidaptor rapid-in, rapid-out, rapid-spin, chuck-all, and single-hand technology, with strong permanent magnet Drive: 1/4″ hexagon suitable for power tools with DIN ISO 1173-F 6,3 receiver