LHY手用絲錐(三只一付)采用6542高速鋼(HSS)● 特性：1.鋒利無毛邊,直槽切削,刃齒強(qiáng)度更高2.牢固四方柄,通用柄型,牢固耐用3.加工范圍:模具鋼 鋼 鐵 銅等4.三只一付5.螺紋清晰,排屑順暢● Features: 1. Sharp and no burr, straight groove cutting, higher cutting edge strength2. Strong square handle, universal handle type, strong and durable3. Processing range: die steel, steel, iron, copper, etc.4. Three one pay5. Clear thread and smooth chip removal