Heavy Duty Construction: Made of metal that will last for years     Durable pads to protect the finish     Tempered steel spring applies consistent pressure and provides instant holding power          Dimensions:     Length: 4-1/4 inch (10.8cm)     Width: 3.1 inch (8cm)     Max opening: 2 inch (5cm)     color:Black     Material:Metal          Package Contents:     10 x Spring Clamps Clips          Only the above package content, other products are not included.     Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.                             10 Pcs Spring Clamps Clips 4 1/4 Inch Heavy Duty Metal Backdrop Support Clamps For Photo Studio Backdrops Woodworking                        Heavy Duty Construction: Made of metal that will last for years     Durable pads to protect the finish     Tempered steel spring applies consistent pressure and provides instant holding power          Dimensions:     Length: 4-1/4 inch (10.8cm)     Width: 3.1 inch (8cm)     Max opening: 2 inch (5cm)     color:Black     Material:Metal          Package Contents:     10 x Spring Clamps Clips          Only the above package content, other products are not included.     Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.