This gun may look small but out powers a newer Mac tool and Snap-On 3/8 air impact at 95lbs shop air. This impact easily took any bolt out of a motor job I did all day using it. 5.0 battery also powered it nicely the whole day and still had reserve left. Highly recommend this. Has about 10 times the power my 12v cordless Mac tool 3/8 impact gun.