Used with Zing It for tarp tie outs and works great.
Used with 1.8mm line The locks will slip if the tension is too high. Not a big deal i just threw a slippery half hitch into the line where it meets the lock to secure it down. I would say use larger then 2mm lines if you plan on using these.
These work great. I used them as adjusters for the secondary suspension on a DIY underquilt with 1/16 shock cord. The secondary keeps the UQ from bunching up once the primary suspension (1/8" shock cord) is set. It should be intuitive for most folks how to thread the cord through them, but I'm a little slower :) and had to look up an image on the web how to thread the cord through them. I would give them five stars if they included a small 'how to thread' image in the package.
The specs say its for 1.5mm-2.5mm but it slips on 1/16"(1.6mm) shock cord if the cord is slackened or if the tensionlock is bumped. I got this to use for a secondary suspension on an underquilt and I have to reset them each time I hang the quilt. They would probably work ok on larger cord but 1/16" is too small for this device.