Insize Wireless Digital Caliper 0–150 mm 0–6" Series 1113 150 Best Carbide 5 16" Short Series Ball Nose Slot Drill (2 Flute ✔ Thread Size: 5 8" BSW BT40 Boring Head Arbor for Large Adjustable Boring Heads – BT40 BST 100 ✔ Thread Size: 5 8" BSW (British Standard Whitworth)✔ Standard: ISO 529✔ Material: High Speed Steel (HSS) for enhanced strength and wear resistance✔ Thread Form: 55° flank angle for precise and secure Whitworth threading✔ Tolerance Class: Class 2 for a standard thread fit✔ Flute Type: Straight flute for effective chip removal✔ Lead Type: Intermediate lead for balanced cutting performance✔ Cutting Direction: Right hand cutting✔ Application: General purpose threading across various materials the 1 2 Drain Rod is a must have tool for every homeowner and plumber alike Automatic Power Off: Yes (move the digital unit to turn on) Ideal for professional machining