This all-purpose blockis a great all around solution. A self-lubricating Acetal polymer sheaveensures low friction and is extremely durable.This blockis the right choice for sheets, halyards and control line applications for cruising and racing. Head can be locked at 0 or 90 by engaging the grub screw in either the 0 or 90 degree position. The becket pin is removable so line can be spliced prior to fitting and it locks into position without the use of tools. High working load Low maintenance, long service life Sheave Size: 2" (50mm) Line Diameter: 1/2" max. Lockable swiveling head post Slotted pin shackle eliminates fouled lines Grade 316 stainless steel load strap Impact and UV resistant, fiber reinforced Nylon cheeks Self-lubricating Acetal polymer sheave ensures low friction and extreme durability