This is a pair of quality inner flange and outer lock nut set, which are made of iron material, integrated molding, numerical control machining standard parts. Help modified angle grinder from 100mm to 125mm. 20mm and 22mm bore grinding discs can be installed. Specifications: Name: Angle Grinder Accessory Material: iron Item size: 40 * 40mm / 1.57 * 1.57in Package size: 150 * 100 * 50mm / 5.91 * 3.94 * 1.97in Package weight: 98g / 3.47ounce Packing List: 1 * Inner Flange 1 * Outer Lock Nut