Product Advantages : 1. Handle the human hand in accordance with non-slip grip design, the appearance of a unique feel comfortable ans safe operation of labor-saving. 2. A unique handle design containing 6 approved mouth precision, simple operation can be easily adapted to different areas of operation. 3. Ease of disassembly of multi-point adjustable rod then can be adjusted according to different lenghts. 4. High precision nozzles approved material Cr-V Steel ( 6150#) after a special heat treatment (hardness HRC 52 - 56 ).