L Track, sometimes referred to as Cargo or Aircraft Rail , is ideal for creating a linear set of mounting points in truck/van beds, Trailers, & more. Pre-Drilled & Countersunk 4" OC, with holes starting 0.5" - 3.5" from cut length ends. Pairs with Cargo Ring SKU# LT-RING and Cargo L Track End Cap SKU# LT-ENDCAP