The maximum diameter of the spring: the metal 9/16 "(or 14.3 mm) / plastic - 51 mm Drive Type: Mechanical Weight: 16 kg View Binding: plastic and metal springs Hole pattern: 21 rectangular / square 34 Perforation: 18 sheets Binding Thickness: metal. spring - 120 / plastic. spring - 500
>Universal manual stitch CW - 350 has a double bookbinding system: Binding plastic spring and metal spring binding step 3: 1. Binding is equipped with two perforating devices: the first - perforation under the plastic spring (21 holes of rectangular shape), the second - the perforation under the metal spring (34 square holes). Perforation and crimped metal spring are controlled by one lever and the opening and closing of the plastic spring holds the other. The device has a perforating depth control function for the binding plastic spring. A4 - maximum sheet format. In case there Booklet determinant spring diameter and thickness determiner unit, and also has a spring retainer.