Position for loading the pencil from the top of the integrated sharpener for efficient one-handed sharpening, without the need to remove the case. Optimal lead hardness (2B) to ensure maximum visibility on all surfaces. Protective case and robust stainless steel tube - Long-lasting due to protection against dust, debris, and moisture. Rechargeable standard size 2.8 mm leads suitable for common applications. Push mechanism for automatic lead advancement. Lead length: approximately 130 mm. Lead diameter: approximately 4.8 mm • Designation: leads for mechanical construction pencils • Quantity: 10 pieces • Type of refill: graphite • Hardness: 2B • Diameter: 2.8 mm