ITEM NAME:7PCS Hex Shank Titanium Steel Screw Thread Drill Bits Set Compound Tap M3-M10.Specifications: M3, M4, M5, M6, M8, M10, extension rod. Tap style: spiral groove. Shank type: 6.2mm hexagonal handle. Thread type: fine thread. ï ¼Ë†2ï ¼â€°Extension rod with magnet can be used with electric drill.