WRIGHT 4478 Torque Wrench, 1/2 in Head, 24.4 in L, Steel, Chrome

Accurate, +/- 4% clockwise, +/- 6% counterclockwise at 20% of the scale. Easy to operate, Rugged, durable. All parts made from alloy tool steel for long life accuracy. Positive lock with spring loaded pull down lock ring, super rugged knurled metal for industrial use. Pull lock ring down and turn handle to adjust reading, positive locking device cannot be jarred into unlock position.