Acme United Plastic Manual Pencil Sharpener, Assorted 24 per Pack : Amazon.co.uk: Stationery & Office Supplies
Staedtler Double Hole Pencil Sharpener, Two Holes for Standard Pencils, Large Colored Pencils, and Makeup Pencils, 512 001 BK : Amazon.co.uk: Stationery & Office Supplies