Singing Rock Oxy Triple Lock CarabinerHot forged light alloy oval carabiner designed to be used especially with pulleys, ascenders and descenders. rough notches on the locking sleeve for easy manipulation angled snag free Keylock nose for smooth clipping and unclipping hot forged I beam construction makes the carabiner extremely strong, stiff and light almost oval shape makes the carabiner easy to turn around in devices attachment points, anchors or slings thanks to the oval shape,