Luminous Metal : Compared to , the 2mm round refill of a metal mechanical pencil allows for placement of a luminous that is not easily erasable, and the reflective creates a visible on metal and oily surfaces for welders and plumbing Use a : 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 , which is non-slip and easy to hold Easy To Use: welding pen has a built-in sharpener that allows you to sharpen the refill quickly, and a clip on the can be clipped to clothing for your great Suitable for occasions: These mechanical pencils for drawing are suitable for , welders, architect designers, students, office workers, etc. They can be used on wood, metal, tile, paper, cement, etc. color:Blue+black Material:Metal + Plastic Package Contents: 8 x pencils (4 black, 4 blue) 8 boxes x silver refills (12 per box) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.