Hey, river dogs!! I have been using the PRO-LOKS rowing system for a few years now and have been very pleased. The radial movement is far better than anything I have ever seen. The steel is 303 stainless and seems to be very strong. As the manufacturer had indicated, the removal of the rope wrap makes for a very smooth operation. There is a detent in the oar coller that lines up with a stainless allen on the oar stopper. They call this the PRO-RITE, very ingenious, you can use this to hold the oars position, or spin the oar over to feather the oars. They say that thier product will work with Most composite oars but I just ended up buying thier oar, the PRO-LOKS oar. It has a nice dynel sleeve in the wear area. That's all for now, anyone interested should go to thier sight at PRO-LOKS.com. Give them a call if you have any questions they were very nice and personal.