CyanCloud Electric Pencil Sharpener, Double Hole Rechargeable Automatic Pencil Sharpener, Battery or USB Powered for Kids, Artist, and Student(White) : Amazon.co.uk: Stationery & Office Supplies
Jakar Pencil Sharpener Plastic Single Hole Wedge Pack of 2 5004-2
Pencil Sharpeners & how they can aid your technique - STEP BY STEP ART