Features:Made of aluminumlightweight and durable, these blocks won& 39;t dull the cutting edges of your blades and bits.5pcs Gauge Blocks set comes in five different sizes: 1/8", 3/16", 1/4", 3/8" and 1/2", with the same length 2.55in.There are clear size markings on the surface for easy use.No measuring involved, simply use them as gauges to check distances or height, and you can combine two or more blocks if you need other sizes, flexible to use.Widely used to set up bits, blades, fences, and other tools for precise distance and height.Specifications:Material: AluminumLength: 6.5cm / 2.55inSize: 1/8", 3/16", 1/4", 3/8" and 1/2" squarePackage Weight: 79g / 2.78ozPackage Size: 1 1.3 * 9 * 2.6cm / 4.44 * 3.54 * 1.02inPacking List:1 * Gauge Blocks Set(5pcs)