Do you know why some KNIPEX circlip pliers have an “A” in the article number and others have a “J”? Circlips hold axles, shafts or entire assemblies in place. There are two types: Outer rings (German: Außenringe), which are placed on a milled gap, and inner rings (Innenringe), which sit deep in a hole in the same gap. The “A” stands for “outer rings”, the “J” for inner rings. And why “J” instead of “I” ? Because the capital "I" is indistinguishable from the lowercase L in some fonts. The more yo