The Scribe-N-Cut Folding Knife is a must have for the vac-former and scratch building hobbyist. Scribe and cut styrene plastic with precise control. A tiny curl of material is removed with each stroke. The hardened steel blade scores and cuts acrylic up to 1/4" thick. Swivel blade folds away safely for storage, yet stays in place when scoring. Simply score material and break along straight line.