Sealey AK4925 Bit Holder Quick Chuck Chrome Vanadium steel quick release adaptor suitable for use with 1/4"Hex drive bits. Simply pull the colour sleeve to release bit. Chrome Vanadium steel quick release adaptor suitable for use with 1/4" hex drive bits Simply pull the colour sleeve to release bit Drive: 1/4"Hex(M) - 1/4"Hex(F) Lifetime guarantee* Model No AK4925