THIS LOT INCLUDES TWO KENNAMETAL TOOL HOLDERS. THE FIRST TOOL HOLDER IS A KSBR12 MODEL WITH A 0.750" SHANK AND AN OVERALL LENGTH (OAL) OF 4.5". THE SHANK SIZE IS 0.750" SQUARE. THE SECOND IS A NER-163C NI6 TOOL HOLDER WITH A 1" SQUARE SIZE AND AN OAL OF 5".