Four inch straight blade for the Industrial Hot Knife. Wrench for replacing the blade is included with the Industrial Hot Knife. The thick, ultra rigid 4" Blade gets even hotter than the 6" Blade and is used on materials requiring very high cutting temperatures. When cutting at high heat settings, try to keep the entire blade embedded in the foam to prevent it from warping. The Industrial Hot Knife will accommodate 4" and 6" blades. The 12" blade requires the Industrial Sled Guide.
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