Premium steel heavy duty 2 blades feature an angled razor sharp edge and piercing tip.great for making precise cuts into a wide variety of materials such as matte board foam core plastic cardboard and wood. Storage is safe and easy with packaging that doubles as a blade case.Ideal for cutting matte board foam core plastic cardboard wood and more Extra thick premium steel blades feature a razor sharp edge Piercing tip makes exact starts and stops easy Packaging doubles as blade case for safe convenient storage Compatible with Fiskars Heavy duty Easy Change Detail Knife item 165100 and Fiskars Heavy duty Craft Knife item 165170 Compatible with most heavy duty detail knives Includes five heavy duty 2 blades1 pack of 5 piece