This is a mechanical pencil called "Solid Write" from LACONIC®. This mechanical pencil has the following features: Brand and Series Name: LACONIC® EQP Solid Write. Lead Diameter: 0.5mm. Design and Functionality: Designed for focused writing, the main body of the shaft is rubber-coated for a comfortable grip. Instead of a pen clip, a hexagonal ring part prevents rolling. Concept: Based on the concept of "Solid = feeling a sure response, Write = focusing on writing." Specifications: Size: Length 149 x Shaft diameter 9mm Weight: 23g Lead Diameter: 0.5mm Color: Black