A heavy-duty impact wrench is essential if you routinely deal with stubborn, rusty lug nuts while performing auto repairs. It's also a must-have for busting through brake caliper bolts and tightening or loosening the fasteners associated with certain engine parts and suspension components. Bosch specializes in selling a variety of high-quality impact wrenches, ranging from the Bosch 18V 2-in-1 Impact Wrench and Driver to the Bosch 18V Profactor 1/2-Inch Impact Wrench, and can set you up with one that meets your toughest wrenching demands.Right now, the Bosch 18V 1/2-Inch Mid-Torque Impact Wrench offers the best bang for your buck. It regularly retails for $189 but is on sale for $99, thanks to a 48% discount at Amazon. This is the lowest price this particular Bosch power tool has been available for over the last three months.Bosch 18V 1/2-Inch Mid-Torque Impact Wrench, $99 (was $189) at AmazonBosch 18V 1/2-Inch Mid-Torque Impact Wrench, $99 (was $189) at AmazonCheck PriceProsCompact design makes it easy to maneuver in tight spacesStrong brushless motor produces 410 foot-pounds of breakaway torqueAuto bolt release feature prevents accidental nut and bolt dropsConsNo Bosch 18V battery or charger includedHigh-output Bosch 18V batteries required to reach highest torquesSpeed settings come with a slight learning curveWith a head length of just over 5 inches and a weight under 2.5 pounds, this impact wrench is remarkably compact, letting you maneuver it into engine bays and other tight spaces with ease. But its size doesn't stop it from producing plenty of torque, as its brushless motor can deliver up to 410 foot-pounds of breakaway torque and 250 foot-pounds of fastening torque. It also has an innovative auto bolt release designed to improve efficiency by preventing it from inadvertently dropping nuts and bolts.This impact wrench also offers a few other features that make it well worth buying, especially at its current discounted price. It has a 1/2-inch anvil with a friction ring and pin hole to make socket changes smooth and effortless. It also has several speed settings to customize its power and a built-in LED work light to illuminate dark spaces.Unfortunately, this impact wrench doesn't include a battery or charger, but you'll be happy to hear Amazon has many on sale right now. For example, you can get a Bosch 18V Battery and Charger Starter Kit, which includes a pair of Bosch Core18V 4Ah batteries and a standard charger for only $144, down from its regular retail price of $245, representing a savings of over 40%.Related: Amazon Quietly Discounted a Ton of Bosch Power Tools for Up to 48% Off"It's a powerhouse that works great in tight spaces," one reviewer wrote.Another added, "It's a small but powerful tool. It's very light and compact for the amount of torque it can achieve."Deals We're LovingBosch 18V Impact Driver, $149 (was $209) at AmazonBosch 18V 6-1/2-Inch Circular Saw, $179 (was $245) at AmazonBosch 18V Screwgun and Cut-Out Tool Combo Kit, $299 (was $495) at AmazonThe Bosch 18V 1/2-Inch Mid-Torque Impact Wrench is 48% off at Amazon. Grab this indispensable tool today and stop letting stubborn nuts and bolts get the best of you.