In these tools the steel head is replaced by a wooden one. Fig. 405 shows the usual square form; there is also a round form. The former ranges from 6 in. long and 2 1/2 in. by 3 1/2 in. wide, costing 9d., to 7 in. by 3 in. by 4 in., costing 13 1/2d.; the latter, from 5 in. long and 3 in. diam., costiug7d., to 6 in. by 4 in., costing 11 1/2d. These have hickory heads; similar tools made of lignum vitae cost nearly double. The chief use of the mallet is in conjunction with the chisel.