Description: 【Perfect Compatibility】This special removal wrench is for ,50,60,100,140 Sand Filter. 【Function】A must have to loosen or tighten the Interior Bulkhead Nut of your sand filter. Practical wrench, make removing and installing the nut . 【Reliable Quality】Manufactured from high quality metal for durability and good performance. Overall heat treatment, high hardness, high , sturdy and durable. High standard Powder Coated for wear, rust resistance, having long using life. 【Easy to Use】When in use, the wrench to the nut. Turn the nut clockwise and tighten to the proper . Instead, turn the loose nut counterclockwise to remove. 【High Performance】Specially designed to easily and properly install and remove the interior bulkhead nuts, prevents from damage and leakage. Perfectly works for 3-1/4” nuts. Specification: Material: Iron  Size Chart: 12cmx8cm/4.72inchx3.15inch Package Includes: 1 Interior Bulkhead Nut Wrench Note: Please allow slightly errors due to manual measurement and different monitors.