Check the listing for details. K&M Precision Micro-Adjustable Neck Turner Large Body w/ 50 Degree Steel Cutter. Condition: New. Listed at 78.40 USD. Micro-Adjustable Large Caliber Neck Turner Body with Steel Cutter. To properly combat the formation of a doughnut the neck should be turned so the cut ends slightly into the shoulder. Our cutter lead angle will accommodate all shoulder angles by allowing you to cut into the neck/shoulder junction while the leading angle “blends out” of the shoulder.