Milwaukee Cordless Ratchet – M12 2456-20

This handy cordless ratchet could be thought of as the baby brother of Milwaukee’s 2450 M12 impact driver.

With a forward/reverse switch and a super low profile, it appears like a good tool for many car-related or other activities that have little clearance for your fingers or little space for swinging a wrench or normal ratchet handle.

Although it only has 30 in-lbs of torque, it should have enough power to handle many of those places deep in your engine where your fingers dare not go.
Source: Popular Mechanics