FVW Auto Locking Rock Climbing Carabiner Clips, UIAA Certified Professional 25KN (5620 lbs) Heavy Duty Caribeaners for Rappelling Swing Rescue & Gym etc,Large Carabiners,D-Shaped

using these for safety harness for climbing on my roof. Going to use a Prussic knot to keep me from falling off the roof, these will be connected to my safety harness as a secondary point. I have a regular safety device, but TWO devices are better, as I'm 60 years old, and probably have no business going up on my roof to repair shingles, but I'm going to do it anyhow.

Chinese made but so far have held up to medium duty tree pulling.

Extremely strong clips, I use them in construction sites. Legal by OSHA standards.

Didn’t hold up to the stress as much as I had hoped two broke immediately have not put others to the test probably my own fault

Work as advertised & easy to open with one hand

Useing it for horse lead. Works great.

I have now bought these carabiner clips twice. I keep one set in my apartment (in South Carolina) and one set in my home (in North Carolina). I use them when I exercise with bands. I feel very secure with these clips. They are very easy to use -- I can use them one-handed! I recommend them.

This review is for FVW 3 Pieces Heavy Duty Climbing Carabiners, 25KN Auto Locking Rock Climbing Carabiners Clips (Orange). We were hosting an escape artist Service Dog (100+lb German Sheppard) who loves cats (and is cat safe) - the cats OTOH had different ideas about that relationship. Unfortunately, we had to crate him during a medical appointment, and his efforts toward kitty friendship would not be thwarted by a silly old locked Metal XL crate using three cheap carabiners as backup. We returned home to two cats on top of a dresser (within reach of the dog if he stood up on his hind legs), a sleeping dog on the floor next to the dresser and two broken unrated/cheap metal carabiners (standard gate & threaded locking mechanism) and a bent front crate panel. Time for an immediate upgrade, this time getting something actually climb rated and auto locking. These worked great - they ensured he couldn't 'break' the gate mechanism (placed one on top, latch side and bottom), or manage to somehow open the gate to undo it's placement (we suspect he used his mouth on his previous escape). They held up with no signs of damage despite his best efforts to escape during later confinements.My measurements (as seen in the photos) were as follows:Longest Length - 4.5 inWidest Point on tapered side - 2.75 inNarrowest Point on tapered side - 1.5 inWidth varied between 0.25 - 0.312 on body of carabiner **did not measure auto lock width which would have been thickerI also included a photo showing this next to a BlackDiamond screw gate carabiner for size referencing.Do note that the twist lock is a little difficult to operate one handed as the spring is stiff - it can be done, but everyone else in the house has to use two hands. It is designed this way intentionally so that the gate cannot open accidentally without direct and distinct actions being taken. As such, I would not want to use this in an application were I needed to frequently lock/unlock the carabiner , or in a situation where my life depended on my ability to operate it in less than ideal conditions using only one hand. However, applications like connecting your swiss seat to an Figure 8, holding a metal XL dog crate door closed, or an attachment point for certain gear (hammock line/backpack attachment point) would be the perfect uses for this device.