FT1143: M12 x 20 x 148 Exact Rear Indexer

Paragon Machine Works FT1143: M12 x 20 x 148 Exact Rear Indexer.   Please note that Paragons 12mm indexers are available in two sizes, 20mm or 19mm.  If your dropouts require the 19mm version, this 20mm size will not fit!   The 20mm size is the correct size for Paragons dropouts.  Some imported dropouts require the 19mm version, which I do not currenlty stock.

Reference: PMW Website