20pcs Self Tapping Slotted Screw Metal Thread Insert Nuts for Helical Repair M4 x 8mm Set

EASY TO INSTALL: These self -tapping thread inserts has self-tapping ability, does not need to be pre-tapped, can be directly used by the installation tool to screw it into a specific hole. STURDY: These threaded inserts have a good connection performance, can enhance connection strength and improve connection condition. WEAR-RESISTANCE: Good wear-resistance, can be used for parts that requires frequent removing. SAFE: It has the ability of strong vibration resistance, which can prevent loose.Can be used in many different places. HELP TO MAINTENANCE: A damaged screw hole can be used as normal after installed a thread insert.