What You Will Get: the kit comes with 50 pieces jack flange short nuts, and the quantity is sufficient for you to use and update in daily life, meeting your different use demandsDetailed Size Information: the growth nut measures 4x20 in threaded Insert and the inner ring is around 4.4-4.6mm, is compact and lightweightSafe and Reliable: product of quality metallic material, the expanding nut is galvanized on the surface, stable and durable, corrosion resistant, hard to interrupt or deformation, can be applied with confidenceConvenient to Install: drill the holes in the correct places, alter the anchors into the holes until they are flush with the board surface, remove the screw and thread them in the course of the clamps, put them back within the anchors, then tighten the screw until secureWide Application: petal steel nuts are correct for wood, thin soft wall, hole wall, gypsum board, thin iron plate and more; When tightening the screws or bolts, it is strongly recommended to simply crimp the nut and fix it in place, don't overtighten, otherwise it may cause the threads to come offThe design of the jacks flange steel nut makes the contact area with the touch floor larger, thus getting better the bearing skill and balance of the nut.Notes:Pointed items are included, it's endorsed to wear tool gloves to circumvent damage when using and please hold them faraway from kidsColour:SilverMaterial:steelSize:13.49x13.41x2.21cm,Tube length:16mm Package Contents:50 x quick metallic nutsOnly the above package content, different products are not included.Note: Light mirrored image and diversified exhibits can cause the color of the object within the photo somewhat diversified from the real thing. The dimension allowed error is +/- 1-3cm.