MDTHQ – T-Handle Quick Chuck For 1/4 hexagon bits and 1/4 drive sockets. Quick chuck for quick and easy bit changing. 1/4 hexagon bits drive with recessed magnet on the short end that holds the bit as well as the fastening (ferrous materials only). Ergonomically designed bi-material handle. Blade Length: 12mm / 75mm Overall Length: 87mm / 130mm Weight: 104g Drive: 1/4 Hex