Removable and reuseable adhesive. For home, school, factory and creative use. Come in pre-cuts for easy tear off. Faber Castell Tack It is easy to use alternative to tape, nails, tacks and staples 90 pcs small blocks included Non Toxic, will not leave a mark or stain Adheres paper and small objects to most materials and surfaces including wood, tile, glass, metal, plaster, plastic, porcelain, cinderblock and more Using natural rubber, this Non-Toxic adhesive is great for everyday for home, office and school