Sizes available are 10-40 (equivalent to 1000-4000) , and this is just the perfect range for crankbaits
For others, they like the solid feel of the weight, and some also suggest a heavy spool that is not ported spins faster if you use the spin retrieve
Basically you tie the swivel to your mainline, and put a weight at the bottom of the rig, and the mylar flash on the hooks looks like tiny bugs or baitfish for bigger baitfish to feed on
I have had nothing whatsoever to do with designing or even influencing any Shimano fishing tackle (although I hope to one day), but via my beginning to do some work with them I can of course get easier access to bits and pieces of gear that I want to have a look at - and increasingly I believe that companies like this do in fact have plenty of gear that lure anglers should be seeing
We have caught bass on a Micro Series Chatterbait in almost anyway imaginablejigging, bouncing, dragging, ripping, waking, hopping, flippingthe list could go on