* This Threading Tool Kit consists of: 1 x External 25.0mm threading tool holder SER 2020K16 1 x Internal 25.0mm threading tool holder SIR 0020P16 2 x External threading inserts 16Erag55, 16Erag60 2 x Internal threading inserts 16Irag55, 16Irag60 * Come in aluminum case for safe storage

Accessories: * Threading toolholder for negative lay down inserts * The screw clamping ensures a good and clean fixation * The insert is positioned a -10 degrees cutting angle and -1 degree clearance angle * Applications: * Multipurpose threading toolholders *

* Threading toolholder for negative lay down inserts * The screw clamping ensures a good and clean fixation * The insert is positioned a -10 degrees cutting angle and -1 degree clearance angle * Applications: * Multipurpose threading toolholders *

* These carbide inserts are designed for left hand external threading * Here are some tips for machining threads: * To cut external threads, file the edges of the round rod first and then chamfer it at an angle of 45 degrees * Ensure that when compared to the depth of the thread, the chamfer is bigger * Include a chamfer to external thread end parts; Ensure the starting end of a thread has a flat surface * Also, ensure that it is consistent with the central axis of the thread