GREAT ELASTIC OFFERS BETTER PERFORMANCE:Because of a certain elasticity, thread insert can even the load distribution on each thread, eliminate pitch and tooth deviation between screw and screw hole, and vibration, thus increasing the screw thread connection strength and fatigue resistance STRENGTHEN CONNECTION: These steel thread inserts used in low strength materials such as aluminum, magnesium, can avoid thread damage and a good connection performance, to enhance connection strength and connection condition EASY TO OPERATE AND MAINTENANCE: These Helical Type Thread Repair Inserts are easy to maintenance, install a thread insert into a damage screw hole, then the screw hole can be used as normal, in order to avoid work-piece loss GREAT TOOL : These Helical Coil Wire Thread Inserts are used for parts that requires frequent removing, it can greatly service life and wear-resistance of screw thread ANTI-LOOSE INSERTS: It can prevent screw from loose,especially used for requiring high coefficient of insurance Colour:silver Material:Stainless steel Package Contents: 100 x heli coil Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.