Screwdriver shanks can be securely
anchored in a wooden handle without any risk of splitting by
merely making a slit in the shank with a hacksaw and filing the
edges to sharp points, as shown in the accompanying
When the shank thus cut and filed
is driven down into the handle the sharpened edges will spread,
providing excellent anchorage, and preventing the blade from
turning, no matter how much force is applied in using the
In fact, the handle will break
before the shank will turn.
John A. Blaker, West Auburn, Mass.