Since indirect percussion can be so precisely placed, the platform is often much smaller on flakes produced in this way than in other methods of flake removal. Of course, indirect percussion requires two hands to hold the percussing tool set. One holds the hammer, and one holds the punch. Therefore, modern hobbyists must use a third object in order to hold the targeted piece of tool stone while they strike it. Often, some sort of clamp or vise is used. No evidence for such devices has yet been found in the archaeological record, but this is partly because they would normally be made of perishable materials, and partly because they can have great variation in design.