BQLZR Metal Sliding Bar Tri-Glides Wire-Formed Roller Pin Buckles Slider 25mm Strap Adjuster Pack of 20 Great for hundreds of uses collars, belts, backpacks and much more Fit for 25mm webbing, also can be used in various applications such as sports equipment, pet products and so on. Dimension:outside:34 x 28mm/1.34 x 1.1"(L x W) Inside:25 x 18mm/0.98 x 0.71"(L x W) Material:metal