Ronstan are good, Harken 150's are the benchmark for ball bearing hard coated cam cleats (do NOT use cleat as template when drilling for mounting screws) Some Ronstans have steel teeth molded into the cams - depends on what type of line you are using - 7/16 is pretty large sounding line for an M-Boat. That may require a Large model cleat - Harken Offshore - as example. If the existing worn cleats are Harken - Ball bearings were available as a part (delrin) or hi-load balls (torlon). Schaefers are mid level pieces, hard to engage line compared to others - not particularly long lasting or smooth operating in my experience- just another opinion and worth 2 cents - no charge.( I changed out ALL Schaeffer cleats on my last S2 to Harken 150's - big difference.) Have Fun, Go Sailing! GO In a message dated 7/17/2015 3:40:30 P.M. US Mountain Standard Time, john@eco-living.net writes: Hi all, I need to replace some very aged delrin-ball-bearings-falling-out cam cleats (for 7/16" jib sheets). Anyone have any experience, pro or con, with the Schaefer brand offerings? Such as this: http://www.shopsoundboatworks.com/scmefacamcl.html Vs. for example Harken, Ronstan. thanks, John S. -- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com