20-129-4 - Capacity: 1/4", Spindle Thd -- Overall Height: 1/4"-28 -- 1-1/4" (32 mm), Side To Side -- Shaft Offset: .384" (10 mm) -- 1-7/16 (37mm), Diameter: 3/4" ( 19 mm), Overall Length: 7-5/8" (194