U-100 Blade (5-pack)

Size .025 thick 2 1/2" x 3/4"

These blades are used with the Modern Roofer™ Brick Siding Knife #80 and the KuttO™ Utility Knife #23

This blade is longer than the standard KuttO™ safety box cutter blade and if used with the original KuttO™ it will not fully retract into the housing.   The original KuttO™ safety box cutter uses blade K-17.