The Gibraltar SCGEMC Electronic Mounting Clamp is an excellent way to mount anything electronic to your rack system. Each arm is made of 16.5″ flat metal stock that is attached to a metal rack clamp with large T handle that fits onto any standard 1.5″ rack bar. This gives a rock solid mounting surface for electronics or any large item needing a flat surface for placement. Each arm has adjustable and lockable rubber stoppers to hold items securely in place. Arms are sold in pairs. Gibraltar suggests using memory locks with this item.