The HT hook is by far the strongest hook there is, we rate it up to 30kgs. The hook has a wide, deep hook which feels secure when hooking on to the picture you are hanging, ideally into D-rings or Strap-hangers. Inside the hook there is a three ball-bearing system that grips the hanger as soon as you let go of the button. Also due to this ball-bearing mechanism the more weight you add to the hook, the tighter it grips.
The hook itself holds 30kgs on the steel hanger, this weight restriction is of course doubled when you are using two hooks per picture, check the hanger that you are using has the correct weight restriction also as some systems have a lesser rating on their hangers.
This hook is slim reliable and secure, extremely easy to use and can be adjusted by the millimeter.