The North BSO1 B-Safe® 3/8"-1¼" ball valve lockout is ideal for restricting access to water, oil or gas valves. The body is constructed of sturdy polypropylene which makes it highly resistant to chemicals and solvents. This polypropylene structure can also withstand extreme temperatures and is extremely abrasion resistant. The simple sliding bracket has matching holes on the base piece allowing for variable sized valves to be locked into position. The lockout set comes in a variety of colors for easy key matching.