1、7 PCS SET: The setup block kit includes sizes of 1/8in, 3/16in, 1/4in, 5/16in, 3/8in, 7/16in, and 1/2in. They can be used alone or stacked together, hundreds of combinations that are sufficient to meet your different needs. 2、PRACTICAL TOOL: These setup bars can measure fixed depths, heights, or stack them based on thickness to obtain various variations or sizes. Very flexible and practical. 3、WIDE PURPOSE: The setup block set can be used as height gauge, depth gauge, square stacking gauge, and angle gauge, which is a combination of depth and height gauge and building blocks. 4、STURDY ALUMINUM ALLOY: The setup bars are made of aluminum alloy and anodized, with a smoothly surface that can better guard your hands, milling cutters, and table saws. 5、CLEAR LABEL AND PORTABLE: The surface of these height gauge is engraved with clear labels that will never fade, easy to read. The set comes with a storage box for better protection during transportation.