I use this setup for torquing bolts/nuts whenever the occasion arises. This same setup is also suggested for checking the figures on a torque wrench. Now you can't just connect the scale to the spanner and pull until the needle points to the number you're after. The scales measure weight not force so you need to either use a formula or an online converter to convert weight to force. It's also very handy if you need to use a ringy, an open ender or shifter.