Schaefer's 3 Series blocks offer strong, high quality metal construction built to take the punishment associated with running rigging mounted on the deck or spars. Excellent for use on small cruisers, daysailors and high-performance racing dinghies.
Double block with front side shackle. Works with 303-33 for a 4:1 purchase or 303-15 for a 3:1 purchase. Delrin(tm) sheaves ensure smooth operation and high safe working loads
