Vimax 12mmx1.5 Close End Lug Nuts with 1 Key Neon Chrome 20 Pieces Specification:12mm x 1.50 Thread size ,Material:Aluminum Alloy,Package:Set of 20 wheel lug nuts with 1 key. Our wheel lug nuts use closed-end acorn design,bulge seat can provide greater seating surface to prevent damage during installation,triple nickel chrome plating ensures long life by preventing rust and corrosion. Our locking nuts have superior vibration resistance. When tightening the screw, the crest of the threads of the bolt tightly into the nut 30 Wedge ramp is clamped, and is applied to the wedge ramps generated by the normal force in the bolt axis 60 angle, rather than a 30  angle. Therefore, when the locknut is tightened ,the force will be much larger than the common law standard nuts, has great anti-loosening vibration capability. Abrasion and shear ability: nut thread root 30  bevel make nut force is evenly distributed over all its teeth thread, since uniform distribution of the pressing force of each thread surface, so that the nut can be more good at solving the problem of thread wear and shear deformation. Re-use performance: heavy use showed that after repeatedly tightening and removal, the locking force is still maintaining the original locking Wheel nuts can keep your wheels looking beautiful and they are guaranteed for life not to rust, chip or peel. Every lug nut is fully machined from restricted chemistry steel made specifically and through-hardened for its unsurpassed level of safety. Bulge Style Cone Seat lug nuts have an extended seating surface that is designed to match the wider seating surface used on some aluminum wheels.