1. Sturdy material: Our products are made of aluminum. Aluminum has a low density, making our products lightweight and easy to carry and handle. At the same time, aluminum is strong enough to withstand the pressure and torque during the brake proportioning valve bleeding process. Additionally, aluminum has thermal conductivity, helping to maintain tool stability and prevent performance damage. 2. Practical tool: The brake proportioning valve bleeding tool is a efficient tool specifically designed for brake systems. Its core function is to precisely lock the lowpressure bleed valve, enabling faster and easier brake system bleeding. This simplifies and speeds up the process, preventing valve tripping and enhancing the efficiency and comfort of the brake system during bleeding. 3. Universal compatibility: Our brake proportioning valve bleeding tool is compatible with nonadjustable combination valves, models 1721353, DISC/DISC, and DISC/DRUM PV2/PV4. It can lock the lowpressure bleed valve, allowing for quick and easy bleeding of the brake system on PV2/PV4 valves. Please ensure compatibility with your needs before . 4. Easy installation: Our product is designed for simple and convenient operation, requiring no special skills or tools for installation. First, unscrew the brake failure indicator switch on the valve. Then, it with our tool. Finally, simply screw the tool into place to secure the valve and complete the installation.