Description Flexible: ideal for both square or round 2:1 pitch hole options. Secure: ideal for confidential documents as pages can only be removed by destruction of the wire itself. Full range of sizes and colours available. Binding Wire Conversion Chart NUMERICAL WIRE SIZE METRIC WIRE SIZE IMPERIAL WIRE SIZE SHEETS NO 3 5.5mm 3/16" 30 NO 4 6.4mm 1/4" 45 NO 5 7.9mm 5/16" 60 NO 6 9.5mm 3/8" 75 NO 7 11mm 7/16" 90 NO 8 12.7mm 1/2" 105 NO 9 14.3mm 9/16" 120 NO 10 16mm 5/8" 135 NO 12 19mm 3/4" 160 NO 14 22mm 7/8" 190 NO 16 25.4mm 1" 220 NO 18 R E N Z 250 NO 20 32mm 1 1/4" 280 NO 24 38mm 1 - 1/2" 340 A4 3:1 PITCH - 34 LOOP A5 3:1 PITCH - 24 LOOP A4 2:1 PITCH - 23 LOOP A5 2:1 PITCH - 16 LOOP
