Heavy Bundle Breaker is slightly modified from one of the original sizes, .055 x 1/8”. It was enhanced with the common features of the bundle breaker family; deeper top notch, shallower bottom notch and Accu Tooth alignment. Heavy bundle breaker has a 33% cut to hold ratio. It is commonly used for light to medium weight single wall running across the flutes.

Thickness
4 Pt. (0.71 mm)

Standard Features
.230” (5.83 mm) deep top notch
.375” (9.5 mm) back notch for curved
Accu Tooth alignment on all cut segments

indicates a National Steel Rule innovation.

Heavy (.111 x .055) (2.82 mm x 1.40 mm), 33% hold shown.