Sufficient Quantity: it comes with 2 pieces of welders pencil and 48 pieces of refills in 4 boxes, 12 pieces in each box, sufficient quantity to meet your use, sufficient quantities to meet your daily using needs Illuminate metal marker: the 2 mm round refills can lay out an illuminate marker that is not easily erased compared with soapstone pen, and the reflective marking can make a visible sign on metal and oily surface for welder and pipe fitter Simple to use: each welders pencil has a built in sharpener, convenient for you to sharpen the refill quickly, and the top has a clip that can be fixed to clothing, bringing you a lot of convenience Apply to Various Surfaces: almost any material surface or texture can be marked with this all purpose carpenter pencil, such as oily, rough, smooth, wet, dry, icy, or rusted surfaces, suitable for construction, automobile, bowl, metal, plastic, glass, wood and paper Erasable and Conspicuous: these pencil refills are water soluble and can be wiped with wet cloth when you mark wrong or make the original place more beautiful and traceless; Drawing on a dark surface is no longer a problem