Driver nut adapter set - sizes: 1/4", 1/2", 3/8" square base Ideal for RELIABLE use for drill machines, screwdrivers, drill bits and other devices. Adapters Length: 1/4"-65mm; 3/8"-65mm; 1/2"-73 High quality bits and sturdy construction made of solid chrome-vanadium steel Buy on: in case of problem n Don't hesitate to write to us Quality Square Socket Adapters S&R Socket Adapters for Screwdrivers Set of adapter nuts for screwdrivers of 1/ 4", 1/2", 3/8" square base Reliable. Ideal for RELIABLE use on screwdrivers, screwdrivers, bit holders and other devices. High quality bits and heavy duty solid chrome vanadium steel construction S&R Socket Holder Adapters Features Square Adapters with drive ball Hexagonal shank Standard metric measurement Ideal for adapting all sockets on screwdrivers and screwdriver bits