The best position of file binding point usually needs to be set according to the specific file materials and binding requirements. Here are some common suggestions about file binding points:

1. hole spacing: for three-hole and one-line binding, the hole spacing is generally controlled at about 5mm, the total length between the three holes is 140~ 160mm, the length from the middle hole to the side hole is 70~80mm, and the vertical distance of the binding line is15 ~ 20 mm. ..

2. Binding position: the binding is always on the left, and the connector is placed behind the document.

3. Margins: The top, bottom, left and right margins of the case file are 2.54cm, 3. 17cm, 2.54cm and 3. 17cm respectively.

It should be noted that different archival materials may have different requirements, and the specific binding point needs to be adjusted appropriately according to the actual situation.