Feature:1. Made of high quality manganese steel, high hardness and durability2. Highly processed by high heat treatment with low surface roughness3. Good performance and stability, it has stable measurement4. Fine workmanship, it can provide high accuracy5. There is a box which you can store these angle blocks, easy to carrySpecification:Item TypeAngle BlockMaterial: 65 Manganese steelAngle Measurement Range: 1/4, 1/2, 1, 2, 3, 4, 5, 10, 15, 20, 25, 30Package List:12 x Angle BlocksNote:1. The measuring surface of the gauge and the measured surface of the part should be cleaned before measurement.2. Gauge is a measurement tool and should never be used as a substitute for other tools.3. During the use of the gauge, do not stack with tools, tools such as boring tools, boring heads, turning tools and drill bits, and avoid bump gauges.4. Do not place the gauge near a magnetic field, such as the magnetic table of the grinder, to avoid magnetic fluxing.5. After the gauge is used, it should be cleaned in time. The metal surface should be coated with a layer of anti-rust oil, placed in a special box and kept in a dry place to avoid rust.