This cutter is made specifically for cutting strings and PP bands. The razor blade is designed to be safe to not touch your hand. (Blade is not replaceable)

From the Manufacturer

Safety String Cutters, Pack of 10

String Cutter

Blade is designed to not touch fingers

The sharp blade makes it easy to work with.

Specifications: Product Size (W x D x H): 1.0 x 0.3 x 5.7 inches (26 x 7 x 144 mm); Material: Main Body: Recycled resin.