The present invention provides an insulation displacement connector that is suitable for the tool-less connection of wires of various gages. The combination of channels having a reduction in effective diameter and blades having various gaps restricts the insertion of the wires such that an appropriately-sized pair of blades can pierce the insulation to contact the metallic core of each wire. Because of this configuration, the wire connector does not require excessive force to bite down on the wires. Because a large force is not required, the insulation displacement connector can be finger operated and no separate tool is necessary.