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National SST
SST (serrated scalloped tooth) is an 8 pitch rule designed to produce a safety edge on corrugated that reduces paper cuts in hand packaging operations.
It can he used as a multi-purpose rotary rule since it produces an excellent balance of cutability, wear and edge appearance.
| Thickness | Height |
| 2pt. (0.71mm) | 10mm (0.394") - 50.80mm (2.00") |
| 3pt. (1.07mm) | 10mm (0.394") - 101.6mm (4.00") |
| 4pt. (1.42mm) | 12mm (0.472") - 101.6mm (4.00") |
| 6pt. (2.14mm) | 76.2mm - (3.00") max. |
| 8pt. (2.84mm) | 50.8mm - (2.00") max. |
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Natioanal 11, 16 and 20 Tooth
National 11 tooth is the ideal rule for foam and composite materials that are likely to stretch prior to cutting.
16 tooth is suitable for displays and applications where edge appearance is critical.
For displays and consumer product packaging 20 tooth gives a clean edge. It also performs well on lighter boards and micro flute.
| Thickness | Height |
| 2pt. (0.71mm) | 10mm (0.394") - 50.80mm (2.00") |
| 3pt. (1.07mm) | 10mm (0.394") - 101.6mm (4.00") |
| 4pt. (1.42mm) | 12mm (0.472") - 101.6mm (4.00") |
| 6pt. (2.14mm) | 76.2mm - (3.00") max. |
| 8pt. (2.84mm) | 50.8mm - (2.00") max. |
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National Steel to Steel
A self-levelling rule that utilizes a softer intermittent zone, as opposed to a thinner base, to form a compression zone.
It is available in straights and curves to all standard diameters.
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