Each welders marker has been pre-filled with a refill, you can use them in different , the refills extend the use time of the pencils mechanical pencil: unlike other colors, silver is more suitable for marking darker steel, our round refills are less erasable than soapstone pen. silver solid metal maker refills can be widely applied for oily, wet, metals and so on, which is suitable for pipe welder, , steel construction and even woodworking. Built-in sharpener for marks: the pencil sharpener is screwed into the top of the mechanical drawing pencils, which 't get lost either and your mechanical pencil will be sharpened for nice precision. You can press pen cap to get refill, easy to use. Comfortable design and easy to control: handy pen-style design with convenient pocket clip, nice weight balance and a comfortable non- knurled aluminum grip which provides maximum control. The metal mechanical pen has a 3 claw tip that can hold the refill stronger and protect it from breaking effectively; You can also adjust the length of the refill quickly to meet your different needs Wipeable and conspicuous: these silver pencil refills are water soluble and can be wiped off with wet cloth when you mark wrong or make the original place more beautiful and traceless; Drawing on a dark surface is no a problem Material:Metal colour:Blue Package Contents: 1 x mechanical pencils 6 x refills 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.