They are made of sturdy all metal construction, and securely hold belts up to 1.75" wide. They can be used on belts 2" or wider, but does not clip under the bottom of the belt. These clips are commonly used on Hybrid Style Leather/Kydex Holsters, and includes 1/4" hardware is for attaching it to Kydex Holsters or Leather holsters featuring thick Leather. They can be used on thinner leather holsters using shorter screws/posts. These can be added to gun holsters or knife sheaths so they can be carried inside the waistband for deep concealment. Trusted by Undercover Cops, Military, and Armed Citizens Worldwide.