"DESCRIPTION FEATURES: For professional marking on all surfaces (wood, metal, plastic, glass, ceramics...). Practical push mechanism gives automatic lead feed through a sturdy stainless steel tube Optimised clip mechanism allows easy one-handed operation Integrated sharpener and guide for quick and effortless sharpening while clipped to a trouser pocket The special graphite lead can be wiped off smooth surfaces with a damp cloth Refilling of leads from either end means that this marker is sustainable REVIEWS 4"