Luminous Metal Marker: Compared to , the 2mm round refill of a metal mechanical pencil allows for placement of a luminous marker that is not easily erasable, and the reflective marker creates a visible mark on metal and oily surfaces for welders and plumbing Use a fitterLong Life: These woodworking pencils are mainly made of high-quality plastic and metal materials, which are strong and light, not easy to rust or break, providing you with long-term service; the holding part of the pen is designed with stripes, which is non-slip and easy to holdEasy To Use: Every welding pen has a built-in sharpener that allows you to sharpen the refill quickly, and a clip on the top that can be clipped to clothing for your great convenienceSuitable for most occasions: These mechanical pencils for drawing are suitable for carpenters, welders, architect designers, students, office workers, etc. They can be used on wood, metal, tile, paper, cement, etc.color:Blue+blackMaterial:Metal + PlasticPackage Contents:8 x pencils (4 black, 4 blue)8 boxes x silver refills (12 per box)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.