What part is that Standup Harken Block? Ratchet useful?

[Dan Corcoran]

The ratchet switch broke off our standup mainsheet harken block. I don't specifically miss the feature, but as I realize this block itself is the only part I have not replaced for wear or breakage, I am contemplating its replacement.

Would anyone have the part number or description of our 75mm Harken Block?
Is there a class-approved replacement I should be considering?
Is the ratchet function used at all? Should I forego it if an option? I had not realized it was there at all until we broke it.

Thanks!
Dan
Strider #332

[Vento Solare]

It's a Harken Hexaratchet block. Google it and you'll see various sizes and configurations (swivel, becket, cam cleat, etc.). I usually have the ratchet off but in heavy air it is helpful.