Christensen & Nielsen US-201SS-LPSC License Plate Screw Covers, Anti Theft Security Full Instructions & Support-Stainless Steel, Looks Good for Years, Set of 4 with 4 SS Fasteners HIGH-GRADE STAINLESS STEEL. Not chrome plastic. Detailed installation and removal instructions are on our website. THEY ARE HEFTIER IN WEIGHT AND INTENDED for use in areas where salt is used on roads. Stainless steel is a more expensive material and is used where both the properties of steel and corrosion resistance are required. Will not readily oxidize or pit. That said, if treated or stored incorrectly, any grade of stainless steel may discolor or stain. To maintain optimum appearance, the surface should be cleaned and flushed regularly. THESE LICENSE PLATE SCREW CAPS ARE CONSIDERED A ROBUST deterrent to theft because once installed they don't come apart with ease. They can be removed with some finesse. However, means of removal will not likely be intuitive to someone on a dark street who is sizing up your license plate. Not intended for applications where periodic removal is anticipated. LARGE ENOUGH IN DIAMETER for most license plate screws. They measure 3/4 in. dia. and will accommodate a screw head of 5/8 in. The fasteners supplied are 3/4 inch long number 12 self-threading screws and will be suitable for many vehicles, but not all. Pkg Includes set of 4 Screw Covers and SS Screws. ORDER NOW WITH PEACE OF MIND due to our unrivaled warranty. No fine print. See below. And, for a limited time, SAVE 5% when you buy 2 sets and SAVE 10% when you buy 4 sets.