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                        ( In Box )                                              ( In Spool )
　

The double-loop spirals are produced "open" to be inserted in pre-punched holes of the suitable dimensions. Once inserted in the proper holes they are simply crimped closed with a wire closer. The 3 to1 (3:1) pitch is used for books up to about 1/2" thick and 2 to 1 (2:1) wire can be used for books up to about 1-1/8"; However 2 to1 (2:1) can be also manufactured from 1/4" to 9/16"  on demand.

 　

　

　 Diameters Available:
Coil diameter

　
(inch)
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
(mm)
4.8
6.4
7.9
9.5
11.1
12.7
14.3
15.9
19
22.2
25.4
28.6
31.8
Max Book Thickness (mm)
3.2
4.8
6.4
7.9
9.5
11.1
12.7
14.3
17.5
20.6
23.8
25.4
28.6
Approx.No.of Sheets (80g)
30
45
60
75
95
105
120
135
160
180
200
215
230
　

How to use Double Wire Binding:

　
                                    

                 

                      Double Wire Supplies