Levi N. Leland, of Grafton, "Worcester Gt,., Mass., has taken measures to secure a patent for a new and useful improvement in bit-holders. This new form of bit-stock is intended to prevent the frequent breakage which results from the weakness of the ordinary bit-stock. This is done by forming or casting.a collar on the receiving end df the stock, which is also rhade available in preventing the barrel part of the stock trom becoming loose.