Item：Bracket Clamp Hole Diameter: 11mm Materia: Metal and Plastic Clamp Range: 1- 52mm Color: Black Application: Mic Stand / Desk Lamp / Desktop Magnifier Bracket / Balloon Arch Metal Clips / Universal Bracket Feature： - Aluminum alloy, very solid, simple clamps accommodate all swing arm lights with stems. - The hole diameter is 11mm. The clamp can easy to clip on the workbench, table, headboard or other objects up to 5.2 cm thick and the nut can be easily adjusted to hold the lamp in place. - The clamps bracket may be adjusted to fit either horizontal deck rails or Vertical posts & banisters less than 52mm in thickness. - Suitable for microphone cantilever bracket and other audio accessories. Package Weight: 70.0 G / 2.47 Ounces Package Dimensions (L*W*H): 120*45*35 MM / 4.72*1.77*1.38 Inches Retail Packaging: No, No Packing Packing list： 1 x Bracket Clamp