Features - The Butterfly Impact Wrenches have a compact and lightweight design that fits comfortably in the operator’s hand. The butterfly-style throttle provides instant, single-hand direction changes and speed controlBenefits - The 3/8” Drive Impact Wrench produces 75-85 ft-lb of maximum torque. In addition, the impact- and chemical-resistant housing protects against repeated drops and exposure to shop fluidsDesign - Housing made from lightweight, durable aluminum, the wrenches provide a smooth operation with a built-in swivel air inlet that inlet increases maneuverability and access to restricted work areasUses - Ideal for use under dashboards, transmission, radiators, and other engine work where space is limited. A professional tool for professional users, for maximum performance, we recommend 90 PSI air pressure