Alvin - Lead Pointer with Clamp - This compact lead pointer from Alvin makes smooth, precise points. Features four interchangeable collars to accommodate lead holders of various diameters, an extra-large dust receptacle, three point cleaning pads, and built-in storage for spare collars and pads. Two point gauges in the turret measure lead extension for blunt or sharp points. Clamp to fit tables up to 2 inches thick included. 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.