Facom 1/4" Drive Release Type Micrometer Torque Wrench - 5 to 25nm (R.648-25) - when I first started selling Facom back in the 90's, I was a big fan of the D.150 series of release type torque wrenches. They were a bit pricey at $200ea and only did one torque setting. They were sold to auto mechanics for tightening spark plugs.

The new 648 Series can now be adjusted to any setting within the range of the tool. The only downside is you need an in-house test rig to set the torque. Like the old D.150 series wrenches, when the set torque is reached during the tightening process, the wrench produces an audible click and tension is automatically released to prevent over-tightening. See cut sheet photos for additional details (click to enlarge images).

• Range - 5>25nm (3.75 to 18.75 ft lbs)
• +/- 4% accuracy
• Overall length - 238mm