Two hydraulic and seven pneumatic-powered impact wrenches are available to tighten and remove up to 2 1/8-in. bolts and screws. These ATEX models are for use in Ex zones and hazardous environments. The wide-usage tools deliver high torque and outstanding power- to-weight ratio, declares their manufacturer. Pneumatic wrenches come in several 1/2, 3/4, 1, and 1 1/2-in. square drives for 3/4 to 2 1/8-in. maximum bolt sizes. They offer tightening torque (hard) from 450 to 3,240-tt-lb. These models weigh from 5.5 to 26.9 lb.
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