nbsp;Not as rope friendly as it seems. There are teeth that aren’t shown in any of the pictures, the ribbed part doesn’t even touch the rope on 11mm, just that sharp v groove; Smaller ropes are engaged by the ribs. After filing the teeth down, I must say that this device is amazing. Be aware that for TR solo, the cam will disengage if it hooks on an edge. See video

The major complaint is the size of the carabiner hole. If you use a pear shape carabiner, it won't go around the tight bend. I ended up buying some GM Oval Screw Locking Carabinersnbsp; GM CLIMBING Oval Screw Locking Carabiner 25kN Single Unit . Otherwise, it operates smoothly and does what it is supposed to do. A good tool in a small package.

Works nicely.

Great product. I love it's size, and versatility. Less cumbersome compared to the Petzl Traxion. Over all a great buy for the price. Loss of one star has to do with is operational performance. When used as a pulley on a fixed point. You need to make sure you are pulling strait down. You need to use an oval or a pear ring style carabiner. If you use a D shaped carabiner, the rollnlock will sit at an angel when under load, causing your rope to jump slightly out of the sheave( pulley wheel). If you have the cleat in an 'bite' position, this can cause your rope to pull the cleat around and can lock the cleat in the open position. You also can not side load the the rollnlock, or else the above will occur. It is also difficult to release the cleat from the open position when under load. Even if you quickly take the load off with one hand, trying to release the cleat so it can grab the rope can be difficult. Due to it's width. On D and Pear shaped carabiners, you can not pass the RollnLock to the opposing side of your carabiner. So on a pulley position like shown in the photo. If you need to relocate frequently. You will need to pass remove the RollnLock first before disconnecting from your point. Then connect your biner to your new anchor point, before reconnecting the RollnLock. If you relocate frequently, this extra step may become annoying. It is great for strait up and down, as pulley. You just need to make sure you don't side load it and use a correct carabiner.