For the left-handed users, they live in the right-handed world. Most products are designed for right-handed users, and a few designers design for left-handed users. But I think for both left and right-hand users can use one pair of scissors together to improve the versatility of scissors and give different users the same tolerance in the public environment. More than 90% of the scissors in the world are specially designed for right-handed users. It is difficult for lefty to use the ordinary scissors, they can only choose to customize or purchase special left-handed scissors. "Double scissors" is a pair of scissors that can accommodate left-hand and right-hand users. It is a pair of double-edged scissors. You only need to switch the direction of "blade" to achieve left-right switching. "Tools" should contain users, rather than force users to adapt to the tools.