Found a great booklet from eagle claw that has all of their hook lineup on in and a description of what they all mean. I've included the most relevent ones here... Aberdeen: Aberdeens are light guage wire hooks which are usually brass in color and have a slightly squared round bend. Aberdeens are usually favored by crappie and panfisherman using minnows because of the extra width between the shank and point. The light wire avoids excessive puncturing which helps to keep the minnows alive longer. Aberdeens are very flexible hooks and can literally be bent in a circle without breaking. My opinion of an Aberdeen is that they do have a purpose in catfishing, when there are smaller cats around that cannot swallow a larger sized hook. The small gauge wire makes hook setting very easy, but on the downside they are easily pulled out and will straighten under a big fish. Limerick: Limericks are the traditional trotline hooks used for catfish. They generally have a big eye and long shank for deep penetration. Usually found in stainless and rust resistant finishes. O'Shaughtnessy: Very similar to the Limerick except the point is at a slight angle outward Sproat: These are the classic plastic worm hooks used by bass fishermen with the parabolic bend up top. Kahle: Kahles are those funky shaped hooks with the very wide gap between the point and the shank, with the point of the hook angled almost directly at the eye. These hooks were designed to place the hook farther back in the fishes mouth to prevent tearing out thru the lip. These hooks also have the advantage of holding more bait and being easier to remove from the fishes mouth. Wide Bend: Best description of this hook is it is a cross bewteen a Kahle and a Limerick. The wider bend is for extra hooking space. Circle Sea: These are the circle hooks everyone is talking about. According to Eagle Claw's research, the Circle Sea has a 60% better hook up rate than conventional J-shaped hooks and 95% of all hook sets are in the lip. Setting this hook is not required, basically you let the fish set the hook itself and simply reel in. This hook has greater holding power, more hook ups, fewer drop-offs, and holds bait better. This is one of the best hook choices for catfishing. Baitholders: This design is the most popular among Eagle Claw hooks. The hooks are similar to a Limerick in design but have two barbs on the back of the shank to help hold the bait on securely. Carlisle: These are similar to the Aberdeens, except they have an even longer shank and straight offset point. Mainly for crawler fishing. Siwash: This hook was designed for commercial saltwater baitfishing to penetrate the hard tough mouths to prevent them from throwing the hook. Octopus: Sort of a cross between a Circle Sea and a Limerick. I personally like these in the Gamakasu lineup. Very strong and sharp hooks with an offset eye for snelling.