The Pencil Lengthener can be used for both round and hexagonal pencils. Sliding ring on plated ferrule holds pencil securely. When your pencil becomes too short to hold, just insert it into this tool and carry on using it. The metal handle is the same diameter and hexagon shape as most pencils, so it has the same feel as a full length pencil. Adjustable, works with most standard sized art, craft, hobby and school pencils. Material:Metal+Wood Color: As Shown Diameter of Pen Hole:: . 8.5-8.9mm (Adjustable) length: 12cm Note: The color of the item slightly due to photography and your own computer Package Include: 10 x Adjustable Lengthener Note: Just the pencil extender only, and the pencil is not included. Note:Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3 cm.