Hilti SIW T-A 22-Volt 1/2 in. High Torque Cordless Impact Wrench Kit with 4.0 Lithium -Ion Battery Pack, Charger and Bag 3497769 - The Home Depot
Hilti SIW 18-A 1/2" CPC Compact Impact Wrench - 03487036 - Power Impact Drivers - Amazon.com
Had this Hilti impact drill for 8+ years, never let me down. Still is my primary work tool( I work in construction). Easy to open and clean. Battery still lasts decent amount.