A good cordless ratchet can be a mechanic's best friend. It allows you to save yourself the elbow grease by turning fasteners without having to constantly crank or reposition your tools.

For the best balance of performance ... 3/8in Brushless High Speed Extended Ratchet Wrench Ryobi 3/8in Cordless Ratchet Wrench R18RW3-0 Sealey 3/8”Sq Drive Cordless Ratchet Wrench CP108VCRW ...