Holder with an adjustable clamping mechanism, accommodating a wide range of sizes. You can use 2x4 lumber to create shelves, decorative pillars, and more. Sold as a set of 4. As shown in the photos, 16 screws are also included. - Brand: WAKI - Model: WAT-002 - Material: Plastic and Metal Please understand that these are used items before purchasing. Thank you for looking. 2x4