Use these seven scratch knives to create stunning sgraffito effects. They work great with scratchboard, etching, dry point, and ceramics. This package contains (1) 5-1/2 long handle and seven interchangeable knife tips: SK-1, SK-2, SK-3, SK-4, SK-4W, SK-5, SK-8. Caution: sharp blade(s): handle with care. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years.