Product details:

Spiral-O wires are specially designed to fit the same 19-hole punch pattern as comb binding. Spiral-O wires have 19 loops (similar to binding combs), and come in a wide array of attractive colors. Spiral-O wire offers tamper-proof binding that is durable and lays flat when opened. Uses the same hole pattern as comb binding ; Capacity: 60 - 80 Sheets (Standard 20 lb bond paper) Bind in three easy steps: Simply punch document on your plastic comb binding machine. ; Insert wire into punched holes. ; Close wire using a Wire Closer Machine.