1.PRECISION:gives you the ultimate marking precision,allowing the user to accurately mark to the millimeter.The vernier scale and main scale were designed to slide smoothly into the main body and it fit on to objects ly. 2.MULTI-FUNCTION(MEASUREMENT AND MARKING):with one multi gauge caliper you can do 5 different things! From measuring 45 degrees,90 degrees,depth,width to drawing lines. 3.SOMETHING ABOUT VERSATILITY:measuing tool is absolutely versatile.You can insert a straight ruler and this work as a vernier caliper. 4.EASY-TO-REND THERMAL:Each alumium blade is precisely milled with state-of-the-art MCT equipment followed by sanding procedure and finishing Presses. 5.STABLE YET LIGHT WEIGHT:The blade is made of the anodized aluminum material with 2mm thickness.This stable cast aluminum tool plate is sturdy yet surprisingly .It is 30g lighter than regular vernier calipers. Type:Woodworking ruler size:300x100mm Material:metal colour:black Package Contents: 3 x Woodworking ruler 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.