Features Aluminum Alloy Material: The setup blocks are made of high quality aluminum, the surface is black anodized, which will not damage the milling cutter and saw blade. More Acurrate: Heights of fences, blades and other knives can be set as desired, faster and more accurate than using a combination ruler. Stack at Will: There are 5 different sizes of height measuring devices and 2 hole gauges in the setup blocks height gauge set, you can use them at will to complete your work. Easy to Read: Easy to read scale labels are engraved on each woodworking block to facilitate clear readings for your convenience. Essential Tools for Woodworking: This woodworking gauge block has high hardness, wear resistance and long service life. It is very suitable for woodworking. Specification: Item Type: Setup Block Gauge Material: Aluminum alloy Use: Woodworking tools Package List: 7 x Setup Block Gauge Note: Manual measurement, please allow 1‑2cm error Package List 7 x Setup Block Gauge