Here’s the Great Stuff about these Machined Aluminum (and anodized) reel clamps.  The six sizes offered will fit virtually every reel on the market (or at least 97% of ’em).  The clamps are anodized in black and gold.  The gold clamps are made two ways, one matching Penn Internationals and one matching Shimano’s Tiagra line which has a lighter shade of gold.  The three larger size clamps feature an eye (shown on the gold clamp above) which is useful with a lanyard or even better as a hook-keep when the line isn’t in the water. You can use your existing reel’s hardware, too! These things are well made, well thought out, priced right and capable of fitting just about every reel you own. They’ll fit Penn, Daiwa, Shimano, Avet, Newell and many reels.

Not sure which one to buy, figure the smaller the better. There is some wiggle-room for your bolt spacing, so more than one size may fit your reel. Size 4 offers 1 1/4-1 1/2″, size 5 @ 1 3/4- 2 1/4″ and size 6 2 to 2 3/4″ – post measurements. There is some overlap, usually best to go small rather than larger than needed.