**Advantages**:
1. **Multifunctional**: These spanners are adjustable and can be used for a variety of tasks, making them versatile tools in the toolbox.
2. **Variety of Sizes**: The set comes in four different sizes, accommodating a range of nuts and bolts.
3. **Carbon Steel Material**: The use of carbon steel increases the durability and longevity of the spanners.
4. **Adjustability**: The ability to adjust the size makes these spanners suitable for many applications.
5. **Soft Grip Handles**: These provide comfort during use, reducing hand fatigue.
Disadvantages:
Weight: Carbon steel, while durable, can be heavier than other materials.
Adjustment Mechanism: Some users might find the adjustment mechanism less smooth compared to other models.
Size Markings: The lack of size markings can make it challenging to find the correct adjustment quickly.
Problems and Solutions:
Problem: Adjusting Mechanism Stiffness:
Solution: Regular lubrication can ensure smooth operation and prevent stiffness.
Problem: Absence of Size Markings:
Solution: Users can manually mark the sizes for quicker identification.
Problem: Weight Concerns for Prolonged Use:
Solution: Taking breaks during extended use can mitigate hand fatigue due to weight.
