HSS Threading Tool Set- Double Ended Category: Machine Tool Accessories Description Size Chart Description Used for Internal & External Threading. Manufactured in 55 and 60 degree. Shank SizeShank Length6mm63mm8mm80mm10mm100mm12mm100mm Related products HSS Boring Bars Boring Bar- Carbide Brazed Wood Working Set- 4 Pieces Micro Fly Cutter Holder Set