The patternmaker's vise is sometimes used as a front vise. This style was originally designed for patternmakers, the folks who make the forms used in metal casting. Pattern making is exacting work using shapes not normally encountered by a cabinetmaker. The patternmaker's vise can hold odd shapes at various angles, and it can certainly hold simple shapes at regular angles. The drawbacks of this vise are the expense, the moderately complicated mounting, and a tendency to fragility. The most sought-after is an antique Emmert, but there are several clones on the market today, including one by Lee Valley Tools that is made of an aluminum alloy—which should be less likely to break—and several from Taiwan and which are clones of the smaller Emmert. A possible disadvantage of the patternmaker's vise is it usually requires installation on a bench which is at least 1-3/4" thick