Inline spinners (sometimes also spelled in-line spinner or in line spinner) is a widely used industry term for this style of spinning lure. Unfortunately, not the best choice of name because:
Inline spinners typically have these features:
Inline spinners' history largely coincides with the mass introduction of spinning reels in the USA. The Rooster Tail has its origins in the late 1940s and was very popular by the 1960s. Mepps spinners were being imported by the 1950s and also very popular by the 1960s. Panther Martin spinners were another import with a similar timeline.