Eisen Sharpener Classroom Pack of 25. Eisen sharpeners contain the highest quality German blades and are safe for kids. 25 premium sharpeners in Red, Green, Blue and Yellow. Single-hole sharpener. Easy to use. Each single-hole sharpener measures approximately 1 x 5/8 x 1/2 inches. Each individual class pack contains 25 Sharpeners, Bundle of 5 class packs, 125 Sharpeners total.