(Jack) Kuhn of South Gate, CA. This is a KDK 400 Series Quick-Change Tool Post.
Fits KDK 100, 150, 200 Toolholders. For lathes with 24 swing & Up. 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: 8-1/4" x 6" x 5-3/4 high. Comes exactly as shown in pictures.