My Dad bought these in the late 60's and used them into the late 80's. When he had them, one side snapped in half, and he had them professionally Heli-arced. When he retired in 86 I used them until about 2015 when I had my knee replaced and quit climbing. They do have a left and right, so you need to put them on correct. I'm asking $100 plus shipping. They sell for about $600 new. I put new pads and straps on them a few years before I retired. If interested, please send a PM, these ad's get berried fast. Thanks, Joe.