I bought a few as backup for the exact same thing on my tent, Six Moon Deschutes Tarp Tent. The lock basically holds most of the stress on the tent. The tarp tent is designed around a single trekking pole and the front line pulls the pole forward, supplying tension to the rest of the fabric and tie-outs. It has to be tight, and the lock has never slipped a single mm as far as I can tell. I tested these new ones in particular an 1.5 and 2.1 mm tarred bank line and on the same line on my tent. I couldn’t get them to slip the least bit. “Lock” is the correct term. Going to order a bunch more.
