rOtring Tikky Mechanical Pencil, 0.35 mm Grip, 12-pack, (S0770490). Brass mechanism allows precision lead advancement. Lightweight plastic body with triangular barrel offers drawing and won't slide on tilted tables. The dual-material Softtouch rubberized grip makes the pencil exceptionally comfortable to hold. Fixed lead guidance sleeve prevents breakage and offers a clear page view for precise ruler-based drawing. Hi-polymer leads are durable, strong, flexible, easy to erase, and keep the lead support tip clean. Eraser and built-in sharpener under cap. Limited warranty: guaranteed for 2 years from original purchase date against defects in materials or workmanship.