Typically $44.97 — price, ratings, and availability change often, so check the current listing before you buy.
Audible click at your target torque, so bolts get tightened right instead of "probably tight enough".
Quick Take
Guessing on torque is how you end up with a stripped bolt or a wheel you keep re-checking. Dial in the number, pull until it clicks, done. It is the rare tool that turns a nervous job into a boring one.