This Magnetic Bit Holder is manufactured from stainless steel and fitted with a quick release chuck, allowing the bit to be changed without opening the drills chuck. A powerful integral magnet holds the screw firmly in place while being positioned ready for driving. Size: 1/4in female by 1/4in male. Features: 1/4in hex drive shank Quick release chuck for instant bit changes Quick release chuck for instant bit changes Powerful magnet for screw retention Specifications: Dimensions: H:12.3 x W:1.9 x D:4.8 cm Colour: Silver Guarantee:5 years Material: Metal Model Number: FAISBMBHUNIV