This is a KDK 0 Series Quick-Change Tool Post. For lathes with 8" to 12" 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: 5" x 3-1/2" x 2-3/4 high. Comes exactly as shown in pictures.