KENNAMETAL 3.76102R058V HTS ADJUSTABLE DRILL HEAD - Offered by Verified Veteran-Owned Business. Series HTS DFT, Head Connection 32, 108mm Max Diam Pilot Drill Head;B510S20000 Pilot Drill, 20mm Pilot Drill Diam, 4 Nonpilot Inserts, 80mm Head Length 1 Indexable Drilling. maintenance repair and operations, machining, indexable tools