The rotary MicroTrak pattern, another National invention, is also available on Laser Crease. It is an innovative crease design developed to reduce score cracking and facilitate accurate and positive paper tracking through the press. This product has a unique surface engineered into the top of the crease. This surface structure introduces alternating forces as the rule contacts the corrugated. These bidirectional pressures alleviate score cracking often associated with plain crease.

indicates a National Steel Rule innovation.

6 Pt on 4 Pt body shown here.