Ronstan 4 Point boom block hanger.
Slotted attachment hole allows shackle body to be passed through. 8 x 5mm (3/16") dia. fixing holes.
Can be bent to fit various sized booms.
•Typically used on dinghies, catamarans and small keelboats .
•Grade 316 stainless steel.
Shackle Slot: 5mm x 14mm