Specifications:  Surgically Sharp Spring Steel Razor Blades  4-Jaw Locking Mechanism Secures Blade Safely in Place  4-1/2" Aluminum Handle with Knurled Grip for a Safe, Secure Hold  Excellent for Model Making, Mat Cutting, Etching, Carving, Stripping, Trimming, etc. Contents:  6pc. Assorted Cutting Blades  1pc. 4-1/2" Knife Handle  1pc. Molded Plastic Organizer Case