If your boat is equipped with Karver blocks, you can now add an additional upgrade by investing in Karver’s rope shackles (compatible with KB6, KB8, KB10, KN12, KB8c, KB10C, and KB12C blocks). The rope shackles are lighter per given strength rating than stainless steel shackles, won’t scratch up your deck, and are noiseless. Moreover, the rope shackles are purported to be easier to open than their steel counterparts. www.karver-system.com David Schmidt