I bought these as I have a requirement to back pack with an inflatable kayak. the intention was to pack these into another ruck sack. They fit perfectly into the ruck sack and assemble very quickly. During hard paddling however the blades tend to move as there is no lock position. We found this very frustrating. The paddles in the Double paddle set up also bend a bit. which is not a problem until you try to de assemble and the nuts have jammed a little. Took a bit of effort to take apart after 3 hours paddling. I've done some mods and added a locking slot onto the paddles and they work fine now.