Shakespeare Swivel Ratchet MT for 1" to 1 1/2" Rails

Shakespeare Style 4188-SLRATCHET RAIL MOUNT STAINLESS STEELRatchet action, fast release design for quick and easy laydown. Mounts easily on 1" to 1-1/2" vertical or horizontal rails. Standard 1"-14 thread.9/32" hole for cable feed-throughHandles antennas up to 8'Standard 1" - 14 ThreadStainless Steel, heavy duty constructionHeavy duty construction Specifications:Box Dimensions: 4"H x 4"W x 7"L WT: 3.2 lbsUPC: 719441110703Quick Guide (pdf)