Correct Measurements for Standard Outlets: These metal spacers measure 4.2 x 2.2 inches ( 106.6 x 55.8mm) with a 1.53 inch ( 38.8mm) inner width, produced to fit most US single gang electrical boxes for easy installation Better Steadiness & Security: Thoughtfully made screw slots permit proper leveling, improving look and reducing movement during plug insertion for secure electrical use Double Sheet Construction for Added Strength: The special double sheet setup delivers increased steadiness, stopping outlet / change sinking and lowering movement problems common with thinner spacers Strong Stainless Steel substance: Built from consistent rust proof, water resistant, and tamper resistant stainless steel, these spacers keep their form under pressure, working better than alternatives 10 Piece Pack for Productive Jobs: Each set includes 10 spacers—enough for several outlets Simply loosen screws, place divider, and tighten for fast reinforcement, ideal for home or work area improvements, Manufacturer: YanFengPro