Uxcell Round Die Stock Handle Wrench Set, 30Mm Die Holder (Capacity: 20Mm-30Mm / Specifications: 30mm x 11mm die stock fits 20mm-30mm / M9-M11 capacity, with 5 adjustable screws; 3/8-24 UNF threading round die with 30mm outside diameter Application: Suitable for general purpose threading. Great for re-threading existing threads in hard materials like metal, or making new threads in soft material like plastic. Good for maintenance and repair work. Features: The die stock provides good wear resistance for long service life. With 4 adjustable screws, the die stock can securely hold round dies. The round die features conical locking hole. Easy to Use: The positioning groove of the die should be aligned with the fastening screw in the middle of the die wrench, and the screw should be inserted into the slot of the die and tightened. Tips: It needs to be reversed every 1/4~1/2 turn to facilitate the chip discharge from the chip hole. Suitable lubricating oil should be added to the cutting edge of the die when tapping threads.