Features: Experience enduring power and efficiency with our Drive Board Controller, expertly produced for brushless motors to ensures high performances. Featuring sturdy current control and thermal management, this controller guarantees stability and prevents overheating during prolonged use. Ideal for DIY enthusiasts, professional craftsmen, home users, and repair technicians seek reliable upgrades for their 21V electric drills. Perfect for a variety of applications, including home renovations, workshop tasks, creative DIY projects, and drill maintenance services. Crafted from high temperatures resistant ABS and metal, this convenient and efficient controller is easy to install and promise extended durability. Specifications: Component:ABS+Metal Size:Approx.6.6x2.50cm/2.60x0.98inches Package Includes: 1Pc Drive Board Controller note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color. Thanks!