The X-ACTO Retractable Blade Knife is great for cutting, scoring, stenciling and trimming. A knife for hobbyists and designers alike, the Retractable Blade Knife works well with paper, plastic, film, acetate and more! This model has a special, retractable blade for added safety and ease of storage. X-ACTO knives have been used for decades by graphic designers, artists and crafters. X-ACTO tools are constructed with high-quality carbon steel and superior craftsmanship, allowing for confident, careful cutting.