SET-UP BLOCKS SET. This is a set of 15 setup blocks with a storage case. The 15 gauge blocks measure in height from 1/16inch to 1-31/32inch, in 1/32inch increments (Accuracy 0.001inch), respectively 1/16inch, 3/32inch, 1/8 inch,5/32inch ,3/16inch ,7/32inch ,1/4inch ,5/16inch ,3/8inch ,7/16inch, 15/32inch, 1/2inch, 23/32inch, 3/4inch, 1x2x3inch. They are stackable for more measurement needs. A ! HIGH QUALITY! All these setup blocks are made out of solid aluminum alloy with anodization treatment, which makes them anti-rust and . Laser etched scales in white print are accurate and easy to read. A must-have woodworking tool for those who wants precision. Measure twice, cut once! HIGH EFFICIENCY! These setup blocks are very useful woodworking tools if you work on a table saw and/or a router table. They do quick and accurate measurement on blade height, cut width, router bits height, bandsaw width, inside measurement, and other general measurement in woodworking and even beyond that. You would see how more efficiently and accurately these setup blocks work than a tape measure or ruler does. EASY TO STORE. All the 15 measurement blocks are neatly organized and stored in a solid plastic case with foam inserts and snap lock. Keep them close to your carpentry tools and you 't believe how often you will use them. Moreover, these setup blocks are affordable which matters a lot when it comes to use set-up blocks or not. Setup Blocks Woodworking Height Gauge Set of 15pcs Colour:Red Material:Aluminum Alloy Package Contents: 15pcs Setup Blocks 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.