Fix It Sticks Large Torque Limiter | Durable Accurate Lightweight Easy-to-Use Torque Control Tool | Compatible with Standard 1/4" Drivers

it does the job very well

As advertised by seller

Great for installing optics and other accessories.

What you will end up with is a crapload of different torque limiters once you start, but these are by far, the top end of the tool market. The ratchet handle and variety of bits are of equal quality.They make a single limiter with all the different inch-pounds desired, but you have to stop on your own, there is no break feature on it - while of equal quality, I wanted the sure thing that would break away when. reached the limit. These are it.I have almost 15 limiters at this point, and would still buy the single unit if it had a set-able limit and break feature.You cannot go wrong with these.

I bought the 80 in-lb torque limiter for my MDRX rifle. It enables barrel removal and re-assembly without significant shift in point of impact. It's brilliantly small, so it travels with my rifle. I can't say how precise it is, but for my purpose, repeatability is more important than precision.

Need to tighten down your optic mount base screws to 65in pounds? Simply grab the limiter from your kit, insert the limiter and half inch socket and simply tighten until you feel/hear it "break"-reach the limit. It's super simple. Pricey, but well made.

I've verified many times with a digital torque wrench, and the applied torque is always accurate.

UPDATE: 6 JUL 2021Customer Service was outstanding and they sent out a replacement 62 in-lb limiter that I tested at 60-62 in-lb versus 73-75 in-lb with the other limiter.Original review:I should have tested these before using them, and the first time I go to tighten my FN SCAR barrel screws, it stripped the threads on the aluminum barrel support at the front (Screw #5 on the operator's manual). I've had to remove/install the barrel a handful of times over the past 11 years and always used an in-lb torque wrench that I had: first was a Craftsman for like 9 years and then a Tekton 1/4" drive for the past 2 years - never had a problem with the barrel screws until now. The aluminum threads gave away. Had I known FN used aluminum for that support in M5x0.8mm threading, I would not have exceeded 20 in-lb. The operator's manual called for 62 in-lb and in fact Fixit sticks developed this 62 in-lb almost specifically for the SCAR. The newer SCAR's use a steel barrel support so 62 in-lb would work fine for those threads. I put this 62 in-lb on a test fixture I concocted and my Craftsman and Tekton showed this as 73-75 in-lb before the limiter would start working. I plan to send it back to Fix it Sticks for them to check it out. I'm out a barrel support and no one has these in stock, so I'm going to have to resort to a thread repair insert or maybe look at a MREX fore end.I did buy the blue and red all-in-one devices as a well as a 18 in-lb limiter. After some repeated testing, these came close to my other wrenches well within 1-3 in-lb, and my FAT wrench had a calibration card that showed precision within 0.x in-lbSo BLUF: Check these before using them on anything critical. In retrospect I should have just bought the Seekonk BT2L 62 in-lb or stuck with using my old torque wrenches.