Alvin - Plastic Snap-Off Cutter - Small - The Alvin Small Plastic Snap-Off Cutter is a small multi purpose Snap-Off Utility Knife. Carded, multi-purpose, fully retractable cutter with locking mechanism. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.