Made in USA This is an Autopoint Twinpoint. 0.9mm lead diameter. Comes with a wooden box, perfect for set storage. By twisting the red and blue colored parts on either end, the lead extends. It's a twist-advance mechanism. You can't retract the lead, so you have to push it back in with your finger. A very cool, discontinued American pencil. Both blue and red pencils come with original replacement leads. Twin Color Mechanical Pencil Internal plunger twist-advance mechanism Type: Mechanical pencil body Body material: Plastic