Quick change lathe tool post sets Wwdge Type Piston Type Tool Post Sets. Each set consists of one piston type tool Post and one of each of 5 tool holders: Style1:Boring & Facing.Style2:Boring, Turing & Facing.Style4:Boring, Heavy duty.Style7:Universal Pating Blade.Style10:Knurling, Facing & Turning.Piston Type Tool Post SeriesSwingModel No.100(AXA)Up to 12"951-1111200(BXA)10-15"951-1222300(CXA)13-18"951-1333400(CA)14-20"951-1444