FEATURES - The patented extruded hole design provides up to 14:1 holding power. - On-Off switch is fitted to both sides of block so it can be used on port or starboard side. One of the switches can be removed if desired. - Unique On-Off switch mechanism can be operated under load. - Swivel head post can be locked at 0 or 90 degrees with optional grub screw kit, RF62100S. - Pivoting Lead blocks maintain alignment and keep lines as close to the deck as possible. - Ratchet blocks can be disassembled for servicing or customisation. - Stand-up spring kits and padeyes add functionality to the range.