1. Each block has a different height in the 7pcs gauge block set. It can measure fixed depths, heights, or stack them by their thickness for a wide variation or sizes. Very flexible and practical 2. 4 gauge in 1. The router table gauge set can be used as a height gauge, a depth gauge, square stack gauge, and an angle gauge. It is a combination of traditional depth and height gauges and traditional building blocks 3. Accurate setup block height gauge set sizes: 1/8Inch, 3/16Inch, 1/4Inch, 5/16Inch, 3/8Inch, 7/16Inch & 1/2Inch. The gauge blocks can be used individually, stacked, there are hundreds of combinations, enough to meet your different needs 4. 7pcs miter gauge tool made of aluminum alloy, anodized with a smooth finish can better Safeguard your hands, router bits and table saw 5. The woodworking setup blocks with excellent Light beam technology carving labels, Clear never fades, which makes it easy to read. The picture shows a high-definition rendering. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:Green Material:Metal Package Contents: 1 * Woodworking table saw height gauge set 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.