Package Includes: You will get 40pcs expansion screw in 4 sizes, 10pcs & 10pcs M5 & 10pcs M6 & 10pcs M8. The different specifications can meet your diverse needs of use. Quality Material: The jack nut is made of high quality carbon steel material with electroplated zinc finished, rustproof and -resistant, high hardnessand, hard to deform and break, you for a long time. Precise Product Detail: This metal petal nut has precise dimensions and threads, and can perfectly fit the hole and bolt. Easy To Install: These petal shaped metal nuts are easy installation. Just insert jack nut into the hole, then use a professional rivet tool clamp the rivet nut and hold the screw and material in place. Wide Application: These petal nuts are perfect for kinds of base material, such as iron plate, hollow plate, aluminum alloy frame, wall paperboard, wall cabinet, wall panels, coat racks, cardboard, thin plastic, license plate, drying rack and container tag, . Colour:Silver Material:Carbon steel Package Contents: 1set x tuercas de remache de petalo Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.