The Kastmaster is the most-cast lure in American freshwater fishing. The body is a thick, four-sided wedge of solid brass — heavy for its size, so it casts well into wind and against current. The flat sides give it a tight, predictable wobble that doesn't twist line.
Sizes 1/12 oz to 1 oz cover everything from brook trout in mountain creeks to surf perch and small stripers. Plain chrome is the default; gold for stained water and salmon; rainbow trout finish for stocked-trout lakes.
The Kastmaster retrieve is steady — a moderate, even crank that keeps the wobble engaged. No need to twitch or jig; the spoon does its own work. Watch your line on the drop after the cast — fish often hit a Kastmaster as it flutters down.