Without requiring any tools, Angle-Vu label holders snap onto wire shelving face. Barcode scanning-compatible product comes in packs of 25 and includes card stock sheets for creating labels. Adjustable 1 x 3 in. label holder model 29306 can be adjusted to proper viewing angle for any shelf height. Clear acrylic protects card stock label to keep it clean and visible. Standard 1 x 3 in. label holder model 29308 also features protective clear acrylic.