TQAG – Teng 1/2 Drive Angular Gauge For angle controlled bolt/screw tightening with static read-off point. Read-off possible from any angle thanks to a pair of angled scales. Removable magnet for attaching sockets with 1/2 internal square drive. Drive: 1/2 Dimensions: 420(L) x 80(W) x 66.5mm(H)