Blade Saver sticks are made exclusively with a special grade of material called Kimoplastic the most durable, non-abrasive, and cost-effective material designed for paper cutting. The natural lubricity and self-healing characteristics of Kimoplastic will keep a Bladesaver stick on your machine long after other sticks have been rolled or replaced. Standard Cutting Sticks Challenge Model 20 4168 Pack of 12 Length: 20 Width: 0.495 Thickness: 0.495 Model: 1/2" square w/holes/5