High Quality Material: The triangle key is made of zinc alloy, while the silver key ring is made of aluminum alloy, not easy to rust or break, strong and durable. BETTER FIT: Case key measures approximately 52 x 35mm / 2.05 x 1.38 inches, inner triangle measures approximately 9 x 9 x 9mm / 0.35 x 0.35 x 0.35 inches, compatible with most triangular keyholes; buy Double check your device size before PORTABLE DESIGN: This triangular socket wrench comes with a keychain to attach to your backpack, water bottle, and more. This makes it easy to carry and store and prevent loss Wide range of uses: Triangular socket wrench is used as a wrench to unscrew various valves, such as elevators, gas, electric, radiators, etc., making your daily life easier. How to use: The metal counter keys are T-shaped and the handle is D-shaped. It helps you leverage your strengths and do your job effectively