QualityParts From Oregon That you can depend on. Fits 21" Snow Wolf: Rectangles measure 1-1/2" x 3-3/8" with 2 mounting holes on 2" centers; Crescents measures 1-1/2" x 11-1/4"; Use with our 73-017 scraper bar; ; ; Oregon Equipment Parts 73-016 Paddles Mtd Snowthrower 6 Pie