Ryobi P423 18V One+ Brushless 4-1/2" 10,400 RPM Grinder and Metal Cutter w/ Adjustable 3-Position Side Handle and Onboard Spanner Wrench (Battery Not Included, Power Tool Only) - Amazon.com
RYOBI ONE+ 18V Cordless 4-1/2 in. Angle Grinder Kit with 4.0 Ah Battery and Charger PCL445K1 - The Home Depot
RYOBI ONE+ HP 18V Brushless Cordless 4-1/2 in. Angle Grinder (Tool Only) PBLAG01B - Amazon.com
RYOBI 7.5 Amp 4.5 in. Corded Angle Grinder AG454 - The Home Depot