Size is approx. 14×11.5×7.5cm- Material: ABS resin- Just insert and turn. You can change the thickness of the core tip in 7 steps. Prevents wasteful shaving by making the handle lighter when sharpened. Easy to take out short pencils up to 6 cm. Compact design that is light and easy to carry. How to use. 1. Select the thickness you want to sharpen with the tip adjustment dial 2. Insert the pencil until it is placed and turn the handle to sharpen 3. When the handle becomes light, rotate the handle in the opposite direction to remove the pencil.