Compatible Replacement Part This speed control governor is designed to work with models RH540M and RH540S, for your power tool. Quality Construction Made from durable plastic and metal to withstand regular use while maintaining consistent speed control. Precise Speed Regulation Keeps operating speeds stable for smoother operation and better results in various applications. Easy Installation Simply your worn or damaged speed governor with this compatible part to restore proper functionality to your power tool. Use Scenarios Woodworking tasks such as drilling and screw driving: maintain consistent RPM for cleaner holes and more controlled driving. Light metal or plastic fabrication: steady speed during milling, deburring, or trimming to improve cut quality and tool life. Finishing and surface work: sanding or polishing where constant speed helps achieve an even finish and reduces heat buildup.