Mandrel is consumable. Regular maintenance is the key to durability. Quick and easy to change the gun head without tools due to the self-locking design. LONG PERFORMANCE LIFE: The mandrel, washer, and connecting rod are all made of high hardness alloy steel, and we have added Industrial lubricant to the gun head to make the rivet nut gun more accurate, more wear-resistant, and longer in service life.
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