(Jack) Kuhn of South Gate, CA. This is a KDK 150 Series Quick-Change Tool Post. For lathes with 15″ – 18″ swing. Only a second to change tools. Rugged – No chatter or vibration. No time wasted with shims. Safe and simple to operate. Speed your lathe operations up to 90%. For fine precision work to heavy-duty cutting. Tool Post Overall Dimensions: 6-1/4″ x 4-1/4″ x 3 high. Comes exactly as shown in pictures.