great mounts,used for 8lb speaker, Noooo problem holding them. for key hole mounting just unscrew the safety cable apart (dont cut it ! ) at the silver sleeve coupler and remove the plate,turn center handle enough to remove round plate coupler,reinstall plate bolt,place bolt head into keyhole and use slip joint pliers on the round flange closets to keyhole and tighten,dont over do it, now mount the bracket on the wall/ceiling, now push round plate coupler back into original position and tighten the handle to stop from dropping out and busting your floor and speaker ,position and your done.only complaint - should be made in USA. FYI you get 4 mounts in the kit