For all of your editing/checking needs, the Tombow VP is more richly pigmented than most and features a strong core that can stand up to most any sharpener. 

Tombow was founded in Japan by Harunosuke Ogawa in 1913. The brand is widely recognized by their dragonfly logo, as Tombow means 'dragonfly' in Japanese. 

Made in Japan

Core: a firm but pigmented vermillion/prussian blue

Measures 7" long

Sold individually

Round barrel, normal diameter