Simpers for machine handles are in pairs when intended for handles of circular transverse section, so that when both top and bottom shapers are put together in their proper positions, a hole is formed which is the shape of the handle required. Handles of rectangular section require but the bottom tool, which is used as other bottom tools - the handle being pressed into the shaping implement by means of an ordinary hammering, or by means of a flatter.

Fig. 227 represents the bottom tool of a couple of shapers for circular handles ; the top tool may be attached to the bottom one by means of guides to guide the top tool to its required relative position ; or the top tool may consist of a light shaper, not too heavy to be held by means of a wood handle, similar to that for other top tools.

The convenient mode of making handle shapers is by casting, at which time the gaps must be formed so that little or no smoothing after casting shall be necessary. The small amount of finishing which is required is performed with small chisels, gouges, punches, and scrapers; the cutting parts of the scrapers being semicircular, rectangular, and triangular.