IDenti-pen is a dual-point multipurpose marker that will mark most non-porous surfaces. It’s easy to label personal items with your contact information, or decorate them with illustrations and patterns. Use IDenti-pen to mark on a wide variety of difficult surfaces, such as wood, metal, plastic, glass, golf balls, CDs, and slick paper. IDenti-pen is also the right choice for autographs from your favorite musician, athlete, or actor on photos and memorabilia.