The free-spinning function of the shaft allows for smooth tool rotation. The head angle is also adjustable. Due to the high number of gears, fine adjustments can be made with small increments. - Model: 3600 - Number of teeth: 72 - Drive size (mm): 12.7 - Head angle adjustment: 0 degrees, 15 degrees, 90 degrees - Swing angle: 5 degrees - Overall length (mm): 277 Thank you for viewing.