Dimensions are engraved on the gauge blocks for easy reading, making it easy to set the height of fences, routers, saw blades and other knives as desired. Setting blocks come in a of sizes including 1x2x3in, 1/16in, 3/32in, 1/8in, 5/32in, 3/16in, 7/32in, 1/4in, 5/16in, 3/8in, 7/16in , 15/32in, 1/2in, 23/32in, 3/4in The height gauge set is designed with anodized soft aluminum, which prevents damage to the milling cutter or saw blade during installation, and is reliable to use The mounting block gauge set is made of high-quality aluminum alloy material, which is anti-rust, wear-resistant, high hardness and not easy to damage Features an organized and compact storage box to nothing gets lost during transport or use, and these blocks are easy to store and portable Colour:Red Material:aluminum alloy Size:25 x 15 x 5cm Package Contents: 15 x setting block 1 x storage box 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.