... Φ19, Φ21mmFeatures:1. The use of leverage, screw force, easy to operate and save effort. the main use of alloy, punching hole ... of high-strength alloy steel, light weight, easy to carry.3.Simple structure, easy operation, without power, time saving, effort ... improvement. • Agility Identify emerging trends and act quickly to acquire new opportunities.• Customer Satisfaction Anticipate customer needs and ...