Wobbler (fishing)

Plugs are a popular type of hard-bodied fishing lure. They are widely known by a number of other names depending on the country and region. Such names include crankbait, wobbler, minnow, shallow-diver and deep-diver. The term minnow is usually used for long, slender, lures that imitate baitfish, while the term plug is usually used for shorter, deeper-bodied lures which imitate deeper-bodied fish, frogs and other prey.Shallow-diver and deep-diver refer to the diving capabilities of the lure, which depends on the size and angle of the lip, and lure buoyancy.

The concept of an attractant tied to the end of a line to entice fish goes back to prehistoric peoples, but the modern concept of the plug lure is attributed to James Heddon, a beekeeper from Dowagiac, Michigan, who was whittling a piece of wood one day in the late 19th century while relaxing alongside a millpond. When he rose to leave, he tossed the carved scrap of wood into the pond, and a large bass struck at it as it wobbled down through the water. Intrigued by this, Heddon began experimenting and perfected a design he dubbed the "Lucky 13" — a plug that is still sold today. By the early 20th century, many companies were in the business of designing and selling plug lures.

The construction of typical plug is:

Classic plugs float on the surface or suspend in the water, but will dive under the surface of the water and swim with a side-to-side wobbling movement (hence the alternative name wobbler) upon retrieval, which usually consists of slow to medium fast reel in. This makes the bait seen like a real fish which attracts predatory fish such as bass and pike. Plastic plugs can dive to either a very shallow depth, due to a small lip, or to a moderately deep depth (i.e. several meters), due to a large lip. The angle of the bib also affects diving depth. Sometimes, plugs are named after their diving ability, e.g. "deep-diver" or "shallow-diver". Plugs can also be designed to hover (neutral buoyancy), sink slowly, or sink rapidly. Some have a small metal ball inside to "rattle" when retrieved.

Other lures are sometimes generically called plugs or wobblers. They come in all different shapes and sizes. These plugs are usually made by small companies and cost around twenty dollars. Each plug has its own action or has none unless you give it one. Wood plugs usually range from between 3/4 oz. and 4 oz. The different plugs come in a few basic categories. There are surface swimmers, subsurface swimmers, needlefish, poppers, pencil poppers, and darters. they all have their own specific place and time to be fished.

...
Wikipedia