This knife is for precision cutting and trimming of light-weight materials. Comes with one No.11 blade and a safety cap. The X-ACTO #1 precision knife set is the original cutting tool for any application requiring a precise, accurate cut. This cutting and trimming tool has been used for years by graphics artists, designers, hobbyists and others for making careful cuts and trims consistently and with confidence. The original X-ACTO knife has been praised for more than 50 years as the standard for precision. Attaining this level of precision, accuracy and reliability starts with supreme quality craftsmanship. The X-ACTO no. 1 precision knife is built with a carbon steel blade for a reliable cut every time. Additionally, the sleek design fits comfortably in the hand, allowing you to continue making the precision cuts needed to finish the job, no matter how long it takes. Includes #11 Classic Fine Point Blade. This knife handle also works with No. 10,12, 16, and 17 blades.