Anodized Aerospace Aluminium Base. Low Profile Base 3/16 Tall x 1" Wide. Backside is Magnetized Eliminates Toolbox Slide. Will Hold Fully Loaded Socket Rails in Any Position. 1/4, 3/8 & 1/2 Drives Available. Patent Pending. 16-1/2" Studs. VIM Tools (Durston Mfg.) MR16B16C MAGRAIL TL 16" Long Blue. Shipping Weight: 0.23lbs.