Screwed eye-bolts. Made of AISI 316 stainless steel.
This solution allows an easy removal of the eyebolt from the deck. They can be fitted with a block and a “stand-up” spring.
Blocks with screwed eyebolts include: block with spring and (removable) eyebolt and the base (fixed to the deck).
The same base is suitable for blocks of different sizes: same base for 70 and 80 mm blocks, same for 100 and 120 mm blocks and one for 140, 150 and 180 mm.