Further references:
Partner websites:
Advantages of the two-phase lever corkscrew:
a small serrated blade for cutting the valve
teflon-coated spiral decreasing friction, enabling easier drilling of the cork
rubber-coated handle for easy maintenance and better manipulation
two lever phases make the pulling out of the cork easier due to the division of traction force between the two shoulders
the shoulders are independent of each other, which increases the durability of the corkscrew
Further references:
Partner websites: