Binditek 50 Pack Double Loop Wire Binding Spines, 7/8Inch for Letter Size, 2:1 Pitch, 200 Sheet Capacity, 21-Loop, Black, Students and Coworkers

Capacity of 200 sheets: each double loop binding measures 2.2 cm in diameter and 1.2 mm in thickness, which can hold up to 200 sheets of 20# paper. 50 per box: These binding wires are made of high quality metal, with a double loop style to offer safety and durability, stable enough for your long-term needs. 2:1 Pitch: These double loop binders have 2 holes per inch, they are compatible with 2:1 pitch binding machines or machines with release pins. 2:1 Pitch: these 28 cm double loop binders are designed to be used with letter size paper, or you can bind smaller projects by cutting the oversized part. Uble Loop binding rings have 2 holes per inch, they are compatible with 2:1 pitch binding machines or machines with release pins. Binding wire: the double loop binding wires can gather your files together and organize them to keep them in order, no more scattering or clutter, an ideal choice for your presentation, meeting, or office. They make great suitable gifts for teachers, students and colleagues.