Other than for safety resaons investing in a torque wrench is a great idea because it’s a really satisfying tool to use. “Click.” Halfords ones also come with a calibration certificate for your front room wall.
Almost all torque wrenches come with a certificate. The cheap ones guarantee it’s a wrench.
Got to disagree with Gurninman on the cheaper ones “going out of callibration”. I check mine with an expensive top of range Norbar and it’s “so far so good” for the past year.
The low reading cheap one was under a quarter or the price of the Norbar.
Perhaps I’ve just been lucky.