Our deck organizer blocks are a significant upgrade compared to the standard equipment used on boats built after 1986. The triple block (without our ball bearing sheaves) was the standard configuration on the Catalina 270. They have several advantages over competing blocks as well.
Stainless steel frame is robust and looks good longer than competitors' aluminum and plastic frame blocks
Three 1/4" bolts mean fewer holes in the deck than the typical four 3/16" bolt pattern with similar strength
Anodized aluminum sheaves won't self destruct in the sun like plastic sheaves
2-1/8" hole spacing is the same as original Catalina supplied blocks so you don't have to drill new holes
Large 2" diameter sheaves are bigger than the OEM sheaves were even on the C-30
Ball bearing sheaves turn freely with minimum friction even under load
Maximum line diameter 7/16" 1
Suitable for Halyards and control lines on Catalinas from 22 to 30 feet
1) Although there is plenty of room in the block and the groove in the sheaves will accommodate 7/16" line, we recommend 3/8" as the line will run more freely through the block.