Mainsail gathering brackets.

Jan 21, 2009
Catalina 30 Lake Perry, KS
I just saw a boat with 4 retractable Levers(?) 2 on each side of the boom that swung up to form a V which gathered in the sail. I remember seeing them advertised years ago and am wondering if they are still available. Just curious if they are still available and what they cost. Not sure if they are for me or not but just curious.