If you do a lot of steel work and need precise lines and markings, this mechanical welding pen is a good choice. The material of the silver marking pen's lead is easy to identify through a helmet when cutting or welding. Specification: Size: Silver metal pen: 14.5 x 1 cm. Size: Marking lead: 12 x 0.2 cm Style: marker Warm tip: be careful when sharpening the mechanical metal marking lead to avoid breaking it. Place your on the pen tip of the metal marking lead from sliding and breaking when changing the lead by pressing the pen cap. Material: Metal color: As shown Package contents: 4 x Mechanical markers 48 x Metal marking leads Only the above package content, other products are not included. Note: Light reflection 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 +/- 1-3 cm.