LAMY M 40 mechanical pencil leads deliver consistent, smooth writing performance with HB-grade graphite formulated for everyday writing and sketching. The 0.7 mm diameter provides a balanced line weight—fine enough for detailed work yet durable enough to resist breakage during normal use. Each lead maintains uniform hardness throughout, ensuring reliable performance across extended writing sessions. Compatible with LAMY's M series mechanical pencils, these leads are ideal for professionals, students, and enthusiasts who demand precision and reliability in their writing instruments.