Features: l Made of high-quality metal material, wear-resistant and strong l Thick design, stable and safe l How to choose the model of the protective cover: 1. Measure with a caliper; 2. Use a rope to make a circle. The length of the circle divided by 3.14 is the inner diameter (the inner diameter is measured where the protective cover is installed) l Easy to install. Great for replacing your damaged angle grinder wheel guard Specifications: l Material: metal l Optional Type: Type 100 (42mm inner diameter); Type 115 (42mm inner diameter); Type 125 (42mm inner diameter); Type 125 (48mm inner diameter); Type 150 (42mm inner diameter); Type 150 (48mm inner diameter); Type 180 (42mm inner diameter); Type 180 (54mm inner diameter); Type 180 (65mm inner diameter); Type 180 (76mm inner diameter); Type 230 (54mm inner diameter); Type 230 (66mm inner diameter); Type 230 (75mm inner diameter) Package Include: l 1 x Protective Cover Note: l Transition: 1cm=10mm=0.39inch l Please allow 1-3mm error due to manual measurement. please make sure you do not mind before ordering