Libershine rotary cutter tool is a wonderful tool, makes the chore of cutting faster and more exact, 45mm rotary cutter is the most sufficient size blades for nearly all projects, Ideal for quilting, knitting, scrapbooks, sewing, fabric cutting, Seamstress, Tailors, Arts, Crafts and more. Feature: - 45mm Rotary Cutter - Blade Made of SKS-7 Steel - Sharp & Hardly Dull - Designed with Safety Button - Handy Handle - Ergonomically Designed Anti-Slide & to Reduce Joint Fatigue - Suitable for Right-handed & Left-handed Users - Perfect for Cutting Multiple Layers of Fabric, Paper, Felt, Vinyl & More Use tips: - Sharp blade, please be careful to use, do not put in the place where children can reach - Lock the blade if you are not using it - If you are not using it for a long time, you can drop some of oil on the knife head for maintenance, which can extend the its service life - Blades are consumables, their life may vary with how you using them and the different cutting pad - The dotted blade and curve blades also can be installed in the roller cutter, the blade can be replaced into the same handle