Pilot Delful Double Knock Mechanical Pencil - 0.5 mm - Green & Soft Blue
Check out this new retractable shaker mechanical pencil from Pilot! The pencil tip of this body can conveniently retract to protect the pencil tip, pockets and pencil cases from damage. Just push firmly on the top cap button to extend and retract the tip. When the tip is extended, you can shake the pencil to extend lead or click the top button. Pressing the cap firmly retracts the tip. The pencil body has a colored window that shows the two writing states, the off state "Deru" which means "to come out" and the on state "Furu" which means it is ready to "shake". Refillable with the Pilot HERFN-10 eraser.A mechanical pencil  a propelling pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a lead (pronounced /ˈlɛd/). It is designed such that the lead can be extended as its point is worn away. The lead is not bonded to the outer casing and is usually graphite based, though colored pigments and other solid substances are also used.A ratchet-type mechanical pencilMechanical pencils are often designed and used to provide lines of constant thickness without requiring sharpening, making them well suited to applications like technical drawing and fine-point or general writing. They have also, relatively unusually, been used, either with conventional pencils, or by themselves, for fine-art drawing.