PCT No. PCT/GB93/00845 Sec. 371 Date Oct. 26, 1994 Sec. 102(e) Date Oct. 26, 1994 PCT Filed Apr. 22, 1993 PCT Pub. No. WO93/22808 PCT Pub. Date Nov. 11, 1993A tool for inserting wires into more than one type of insulation displacement connector comprises a stepped locating device such that a first portion (230) locates in one connector type and a second portion is of a width (W) suitable to locate in a further connector type.