Knock-style! A loud knock too! I have put a red foam rubber grip on the front and use it as a sidearm for my Staedtler 925-02. Without the after-market grip, I'd rate it a 4 because the wood seems to be a little harder and sharp edged than most wooden pencils. Usually knock-style 2mm leadholders are more spendy, so this is a must-buy IMHO for drafting/mechanical pencil fanatics.
Kita-boshi Pencil Co., Ltd., a manufacturer of pencils and drawing equipment located in Tokyo, is notable for its green approach of recycling sawdust into new quality products.