51010 Single Hole Sharpeners are die-cast zinc and can handle pencils up to 8.2mm and sharpen to a 23 degree angle.
51020 Double Hole Sharpeners are die-cast zinc with one hole for standard pencils and one for pencils up to 10.2mm. This sharpens coloured or jumbo pencils to a 30 degree angle.
51163 has a plastic shavings container in assorted colours, and a metal sharpener blade.
51262 is a double-hole plastic sharpener for regular and extra-thick pencils, in assorted colours.