No matter what the situation is, don’t use this thing. It appeared when Taiwan fishing just started. As time goes by, its many shortcomings are exposed, and it is completely rubbish. . 1: It affects the sensitivity of the fishing group. The O-ring increases as the size of the pin increases, and sometimes it may tilt to the side instead of vertically when entering the water. The O-ring cannot be made small. , because the strength cannot be guaranteed if it is small. Therefore, this circle affects the sensitivity of the fishing group. 2: These rough and excessive attachments on the fishing group will catch one or two sub-lines when the sub-line sinks. For example, sometimes it is clear that the fishing group is 4 mesh, but after the fishing group enters the water and stabilizes, only flat water is seen. Or the float is not visible, which is caused by the sub-thread hanging on the O-ring. Sometimes you will see the sub-thread still hanging on the pin after lifting the hook. Three: Using quick pins cannot increase the speed of thread changing, nor can it improve the tensile strength of the sub-threads. You will realize this in practice. Although the rubber band is theoretically elastic and can reduce the pulling force of the hook in the fish, its tensile strength is extremely limited. Once you use it you won't want to use it again. Nowadays, it has completely disappeared in various competitive competitions, and usually only friends who have just learned fishing use it occasionally. If you don’t like the traditional lead seat and you don’t usually use it for fishing, in order to avoid excessive movement of the lead seat due to the fish’s struggle after catching a fish, you can choose an American figure 8 swivel, which is Each end is an 8-shaped ring that can be rotated (one end of the quick pin can be rotated, but the other end cannot be rotated), which is used to tie the main line and sub-line respectively. Use this instead of a quick pin. Experts please correct me on the above personal opinions.