These electrical grommets are designed to convert raw-edged holes into smooth, insulated openings, providing protection and insulation for electrical and telecommunications cables, tubing, hoses, ropes, and utility lines. They feature locking fingers that snap into place with fingertip pressure and can accommodate panel thicknesses in fractional increments up to the maximum size. Capable of withstanding forces up to 35 pounds, they are available in various sizes for holes ranging from 0.250 inches (6.4 mm) to 6.00 inches (152.4 mm) in diameter. Specifically, brass-colored parts suitable for lamp and lighting applications are offered in different part numbers, including SB 312-3 Brass, SB 375-4 Brass, and SB 437-4 Brass.