Shakespeare Style 4187-HDEXTRA HEAVY-DUTY RATCHET MOUNT STAINLESS STEELVersatile four-way ratchet design for deck or side mounting. Quick-action handle makes operation easy. Standard 1"-14 thread. The Style 4187-HD adds extra strength and rigidity.Use wherever its extra heavy-duty construction is needed. Standard 1quot;-14 thread.9/32" hole for cable feed-throughBolt holes: 5/16" dia. 3 quot; x 1 & 189;quot; on center Product : SHAKESPEARE 4187HD RATCHET MNT HEAVY DUTY Manufacturer : SHAKESPEARE MOUNT Manufacturer Part No : 4187HD UPC : 719441110512