Product Dimensions:12 x 6 x 2 cm; 150 Grams Exterior:Aluminum,Stainless Steel Item Weight:150 g Specification: Material: Stainless steel 304 Size (inner diameter*installed pitch*installed length) & Quantity: M12*1.75*3D (5PCS) M10*1.5*3D (5PCS) M8*1.25*3D (5PCS) M6*1*3D (10PCS) M5*0.8*3D (10PCS) M4*0.7*3D (10PCS) M3*0.5*3D (10PCS) Weight: 146g / 5.1oz (approx.) Note: Installed length= 3D means 3 x diameter, for example, M4*0.7*3D has installed length = 3D = 3 x 4 = 12mm. About this item It can prevent screw from getting loose,especially used for products requiring high coefficient of insurance. Used for parts that requires frequent removing, it can greatly improve service life and wear-resistance of screw thread. 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 absorb vibration, thus increasing the screw thread connection strength and fatigue resista Steel thread inserts used in low strength materials such as aluminum, magnesium, can avoid thread damage and get a good connection performance, to enhance connection strength and improve connection condition. 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 workpiece loss. See more product details It can prevent screw from getting loose,especially used for products requiring high coefficient of insurance. Used for parts that requires frequent removing, it can greatly improve service life and wear-resistance of screw thread. 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 absorb vibration, thus increasing the screw thread connection strength and fatigue resista Steel thread inserts used in low strength materials such as aluminum, magnesium, can avoid thread damage and get a good connection performance, to enhance connection strength and improve connection condition. 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 workpiece loss.