Coofix. 4.5 angle grinder with three Cutting discs

The Coofix 4.5-inch Angle Grinder is the most common and versatile size of handheld grinder, popular among DIYers and tradespeople for its balance of power, maneuverability, and cost-effectiveness. In many regions, 4.5 inches ($115\ \text{mm}$) is the standard entry point for angle grinders.