The 12 Volt Bible for Boats SHEET WINCH HANDLE They are pretty much square

They are pretty much square 52mm x 56mm - the 56mm side is the side with the three holes

Kiwi slides are normally sewn to the sail luff or can be laced through eyelets

All white in colour

Cast Stainless Steel Deck Filler with lid that has a chain/wire that connects the cap to the filler so unlikely to lose oveboard

The 12 Volt Bible for Boats SHEET WINCH HANDLE They are pretty much squareThe 12 Volt bible for Boats is a complete introduction to the 12 volt electrical systems used on small boats to power everything from a reading lights to bilge pumps. Written for boaters who are not skilled to install, maintain, and troubleshoot them. This second edition has been thoroughly updated to include the latest on marine batteries including AGM and gel cell batteries, multistage chargers, inverters, new wiring conventions, alternative energy