The distance between the shafts is approximately 3.5 - 6.7 inches (90 - 170 mm) (minimum and maximum dimensions between the inside of the shaft), and the angle can be adjusted in the front and back, including parts for adjusting the shaft diameter (2 of each of 6 sizes, 0.5 inches (12.5 mm), 0.5 inches (13.8 mm), 0 mm), 0 mm, 14 mm, 14 mm, 14 mm, 16 mm).