\n\n SA's favourite refill lead\n Ideal for paper, tracing and drafting media\n Extra strong, slow wear rate, dark colour\n Suitable for all Pentel automatic pencils\n 12 leads per tube\n...
Pentel Techniclick Mechanical Clutch Pencil 0.5mm
The Pentel Techniclick clutch pencil:
Light pressure and no need to change holding position to advance lead.
also, Crystal like...