Jonard® RTC-2640RB Replacement Blade for RTC-2640 Rotary Duct & Tube Cutter is designed to ring large HDPE or other similar fiber optic ducts, this rotary duct and tube cutter is perfect for making circular cuts in large fiber ducts without damaging the fiber inside. This tool also features the following:
 
High carbon steel circular blades cut through HDPE or other similar materials with ease
Makes circular cuts in fiber optic ducts and tubes up to 1.5" (40 mm) in diameter
Ergonomic handles provide extra leverage when ringing fiber optic ducts
Carbon Steel construction provides high durability and long life