4 1/2 in Wheel Dia, Paddle, with Lock-On, Angle Grinder - 5GUY2|2680-20 - Grainger
Milwaukee 2680-20 M18 18V Lithium Ion 4 1/2 Inch Cordless Grinder with Burst Resistant Guard and Paddle Switch Design - Power Angle Grinders - Amazon.com
Milwaukee 7a 4-1/2 in Small Angle Grinder
Milwaukee M18FSAGV115XPDB-502X 18v Fuel 115mm Braking Angle Grinder Kit, 2 x 5.0Ah Batteries, Charger, Case - PowerToolMate