STAEDTLER REG Drafting Pencil with Adjustable Lead, 0.5mm

[Equipped with a regulator] The lead advance amount can be adjusted between 0.2 and 1.8 mm with one click. [Special knurling] Provides a smooth grip that feels like you've been using it for years. [Specially Selected Parts] Knock end reminiscent of a diver's watch, with elegant matte finish on the ferrule and clip [Low center of gravity design] The pen tip uses a 4mm long sleeve. Low center of gravity and stable weight balance make drafting and writing easy. [Line width] Easy to use 0.5mm [Size] 140.5 x 11 x 9.5mm / 22.5g