This 12-point strut nut socket set includes 17mm and 21mm sizes, ensuring compatibility with a wide range of vehicles for effortless suspension repairs. Designed for professional strut and shock work, it quickly loosens or tightens fasteners, making disassembly and reassembly safer and more efficient. Crafted from hardened 4140 chromoly steel with a black oxide coating, it delivers superior strength, rust resistance, and long-lasting durability under high torque. The cut-out design allows easy insertion of a hex key to stabilize the strut shaft while torquing with a wrench, ensuring precise adjustments (up to 65-75 N·m). Rigorously tested to meet OEM specifications, this heavy-duty socket set is trusted by professionals for reliable performance in demanding suspension work.