• Adaptor for machine used nut driver sockets • ¼” external square • With friction ball; for regular nut driver • With quick release system for easy and safe locking of the bits • 1/4" hexagon drive, suitable for power tools with DIN 3126, ISO 1173, style E 6.3 • Suitable for DIN 3120, ISO 1174, style F 6.3 • Packed individually in a blister card