These simple boring tools are also well known. The holes made by them result from compression of the wood, hence they are not convenient for hard wood. The blade beyond the handle is merely a straight piece of steel sharpened at the end on both sides somewhat like a screwdriver, for which the larger sizes may often be substituted when using small screws. As the end acts as a wedge, in boring holes with a bradawl, care must be taken not to run the risk of splitting the wood. This may be avoided by keeping the edge across the grain. With the ordinary bradawl, if only the handle is held when attempting to withdraw it the blade sometimes remains in the wood. This may be almost entirely avoided by keeping the forefinger on the blade. There are also some bradawls with improved ferrules which prevent the blades drawing out, but they are not obtainable everywhere. Such a bradawl is the subject of the illustration, Fig. 24.
Fig. 24. - Bradawl.