1. Aluminum Base - Aluminum alloy base,with black soft rubber pad. Clamp the table tightly,prevent slipping.Can hold articles with a thickness of 7cm/2.76inch. 2. 4pcs Adjustable Flexible Universal Arms - Two flexible helping hands, Universal joint pipe, easily positioned where you want them. Eliminates the frustration of traditional helping hands. 3. 360 Degrees Rotated Alligator Clips - alligator clamps can be rotated 360 degrees then "locked" into place with knurled thumb nuts. 4. Universal - Perfect for computer boards/ jewelry makers/ arts crafts hobbyists/welding rework,it can be used universally. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Bracket only, without circuit board. Type:B Colour:As Shown Material:Plastic+Aluminum Package Contents: 1 * Aluminum Alloy Base 4 * Universal Joint Pipe 4 * Alligator 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.