[Alloy steel material]This multifunctional lock spanner wrench is made of high quality alloy steel, the anti-corrosion black oxide coating, weighs only 16 ounces, and offers high hardness and abrasion resistance.[Multi-Function Wrench]This Wrench can be matched with castle nuts, as well as with ring nuts and buffer tube nuts.Can meet various maintenance needs.[Optimized]This wrench is precision engineered to drive wrench head screws, threaded rings and shafts.Its precise fit minimizes the risk of damage to shafts, nuts and housings.[Efficient Operation]This nut wrench ensures a comfortable grip and optimal force transfer.[ Widely Used ] Wrenches are widely used in car and bicycle repairs, as well as home and mechanical equipment repairs. They are suitable for disassembling and installing various components and are very suitable for DIY projects and home repairs