Shear is a guillotine style cigar cutter that uses a standard, utility knife razor blade to do the cutting. The advantage of this design is the replaceable blade. I chose to use the utility blade because it is an extremely easy to find and affordable razor. Only half of the razor is used to cut, so just like a utility knife, you can simply flip the blade once it is dull to have a new, sharp edge. This makes this design superior to many conventional cigar cutters, which become nearly useless after the fixed blade becomes dull. The only additional hardware required is a 6-32 x 3/8 machine screw and nut. These can be found in packages containing 14 sets at many hardware stores including Lowe's and Home Depot for about $1.00 or, if you prefer metric: There is another version that uses a 10mm M3 screw and M3 nut Enjoy! A Relative Design project. http://www.relativedesign.us/blog See all our projects Here: http://www.thingiverse.com/tag:relative_design