Wedge Type Quick Change Tool Post Holder Set for Lathe Series Steel 5PCS/Set. Quick change tool holder is the main accessory of ordinary lathe, composed of a tool holder and a number of tool clips, according to the needs of processing workpiece, select the corresponding tool clips, can be round, end, grooving, cutting, knurling, drilling reaming, boring and other processing. The tool holder is installed on the tool holder through the dovetail groove. It has the characteristics of quick tool change, high positioning accuracy, strong rigidity, etc. It is an ideal product to replace the traditional square tool holder and realize fast turning. Max turning tool holder size. 11.8″6.7″5.5(30cm17cm14cm). 8.7LB(3.95kg)/9.8LB(4.45kg). Product Presentation & Details. Quick Change Tool Post Holder Set 1. You can make order with no worry. Any concern just feel free to let us know, we’ll reply in 24 hours in normal condition. Orders are processed from Monday-Friday; Not on the weekends & public holidays.