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Bosch CORE18V 4-Amp 18-volt Variable Speed 1/2-in square Drive Cordless Impact Wrench (Yes (2 Batteries)

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High-torque impact wrench design – built to deliver professional power, for tightening industrial-duty fasteners like lag screws, concrete anchors, lug nuts
Powerful motor – delivers up to 500 Ft-Lbs of torque to driver large fasteners quickly
Compact CORE18V 4.0 Ah Li-ion battery – engineered to provide next-gen power and runtime, while losing the weight, for optimized performance-to-weight ratio

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The Bosch HTH181-B25 18V High-Torque Impact Wrench with Pin Detent kit includes a heavy-duty wrench and two CORE18V 4.0 Ah batteries. The wrench is engineered for fastening high-torque nuts and anchors. It delivers up to 500 Ft.-Lbs. of torque. Its spring-loaded hammer-and-anvil system moderates torque reaction to allow for consistent driving power and control, and the wrench is built with an all-metal motor that produces up to 2,100 ipm and up to 1,900 rpm. It offers a square drive 1/2 In. pin detent and true flat anvil design for convenient changing of sockets. The kit includes two next-gen CORE18V 4.0 Ah Compact Batteries. Each keeps the power and runtime, while losing the weight, with 21700 cell technology. The CORE18V matches the power of the original two-layer 4.0 Ah battery with half the number of cells. It features the CoolPack 2.0 heat-management system.

High-torque impact wrench design – built to deliver professional power, for tightening industrial-duty fasteners like lag screws, concrete anchors, lug nuts
Powerful motor – delivers up to 500 Ft-Lbs of torque to driver large fasteners quickly
Compact CORE18V 4.0 Ah Li-ion battery – engineered to provide next-gen power and runtime, while losing the weight, for optimized performance-to-weight ratio
Spring-loaded hammer-and-anvil system – delivers user control and managed torque thrust up to 1,900 rpm and up to 2,100 ipm
Metal front housing with 1/2 In pin detent system – offers jobsite tough durability coupled with convenient changing of sockets
True flat anvil design – provides secure fit of sockets while making changing sockets easier
Lightweight for high torque – only 5.2 Lbs (tool only, not including battery)
High-power battery cells – uses enhanced 21700 cell technology, combined with advanced battery design for greater efficiency, to produce longer runtime
Cutting-edge battery cell design – engineered to improve performance