Glenn Ashmore wrote:

I'm looking for feedback on rope clutches. The choices seem to be
between Lewmar, Spinlock and Antal. Lewmars have a reputation for being
kindest to the line but have very small size ranges. They can be ganged
but no side mount is available. Spinlocks have a wide (and adjustable)
size range but are supposed to be harder on the line. They can be side
mounted but the bigger sizes can't be ganged. I don't know much about
Antals other than they are a bit more pricy.

Right now I am leaning towards Spinlocks but I am open to suggestions.

Spinlock also has some substantial looking jammers but I am not sure
where you would use a jammer rather than a clutch.
Add Garhauers to the list-I have heard good things about them from
users, and the price is certainly right. I currently have Spinlocks,
which do tend to fray the rope surfaces a bit. but are really handy
where I have ganged clutches and different size lines. The fraying is
not excessive; current main/jib halyards have held up over 6 seasons
with no need for replacement, just some surface fuzzing. But I would
look hard at the Garhauers if I needed to replace them. The Garhauers
support 5/16" through 9/16" line.