WP Chomp Wallpaper Scorer, With Hardened Steel Wheels 52014 IDEAL FOR ALL WALLPAPERS: Two balanced, interwoven scoring heads mounted on a pressure reactive nylon pivot arm- mild pressure for perforating thinner wallpapers, heavier pressure for perforating thicker/textured wallpapers. HEAVY DUTY WHEELS: The cutting wheels are made from tempered steel  providing 50% more strength than any competitor. ERGONOMIC: Comfort design helps reduce user fatigue. NIMBLE IN DESIGN: The tool is compact in design, maneuverable and ideal for getting into corners and tight spaces. ECO-FRIENDLY: 100% Renewable material. Made in the USA.