(Jack) Kuhn of South Gate, California. This is a KDK-119 Master Bar For Boring Bars Tool Holder w/ Hardinge Collet. For lathes with 12″ – 16″ 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. Collet Size Included: 1/4. KDK-119: 5C Collet Bar Toolholder. Comes exactly as shown in pictures.