[Excellent design] Improved double insect design can join closely, does not fall easily and offers better grip. Biche at the bottom, versatile use. Use with self -locking function, easy to use and improves productivity. An average adult can easily finish what you want with one hand with this key. high quality: made of steel with high carbon 45 content, soaked and forged, with high hardness, good tenacity and a great couple . Hardness can reach HRC 48-52. Special treatment with anti -rust surface electrophoresis. Characteristics: Large 380 mm long key, small 260 mm key; Capacity: 3 - 6.1 cm (L) and 1.5 - 3 cm (s), it can be used on pipes, screws, nuts and so on. Ergonomic handle: Ergonomic handle in TPR secures your Taken the strongest point and keeps user’s wrist in a normal position to reduce tension and improve productivity on work. [Application] can be used for cars, tractors, oil filters , glue joints, shower heads, fuel filters,-burning, PVC intersections, bottles, taps, water