Write for weeks on end without refilling. 12 leads in pre-filled cartridge; it's like getting a whole refill pack in your pencil at once. Frequent mistakes are no match for the larger than ordinary and long lasting twist-up eraser. Cartridges make for an easy, no mess lead replacement. Mix and match cartridge and barrel colors make many fun combinations. Pre-loaded with Pentel® Super Hi-Polymer® Lead (HB) which is guaranteed to scan, never needs sharpening, is super strong and produces a clear dark line. Refillable uses: QDR5LE3BP for 0.5mm; QDR7LE3BP for 0.7mm.
