Quick Installation Design: Easy on structure enables easy installation within 5 seconds; verify switches dimensions, terminals count, and voltages beforehand for compatibility with 21V lithium tools Construction: Made from high strength for enhanced durability and, supporting up to 15A current, ideal for long term use in power tool applications like lithium drill switches and impacts wrenches Compact & Light Weight: Designed for internal handle mounting without altering tool ergonomics; reduces fatigue during prolonged use in DIYer, construction, or mechanical repair scenarios Wide Lithium Tool Compatibility: Specifically engineered for 21V cordless tools like drills and wrenches, perfect for home repairs, job sites, and outdoor projects requiring switches replacements Speed Control: Features power management with stepless speed, allowing precisely control for efficient operations in tight spaces or delicate tasks, boosting productivity, Manufacturer: YIGZYCN