Accurate Gauge Block Set Sizes: 1/16 inch, 3/32 inch, 1/8 inch, 5/32 inch , 3/16 inch , 7/32 inch , 1/4 inch , 5/16 inch , 3/8 inch , 7/16 inch, 15/32 inch, 1/2 inch, 23/32 inch, 3/4 inch, 1x2x3 inch Set up gauge blocks are all 3 inches long.   Perfect Combination: 15 pieces setup blocks can easily set the height of the fence, blades bits and other cutters according to the needs, which is faster and more accurate than using a combined ruler.   Quick Measurement: Combine bars to setup 100's of measurements, or use separately, to achieve work and measure quickly.   Engraving: The height gauge blocks are all marked with engraving, which help you read and accurate easily. You can quickly work on the table saw without guessing and measuring.   Great Performance: 15pcs Blocks Solid Aluminum Construction Red Anodized to prevent damage to router bits and saws. Stored in a fitted case, so it will be more tightly protected during transportation.   Material:aluminum   colour:Red / blue      Package Contents:   1 set x setup blocks woodworking      Only the above package content, other products are not included.   Note: Light shooting 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.