The 3448-3020 is a 20-position Strain Relief made of plastic. It is suitable for use with the 3M? Wiremount IDC socket. The 0.1 X 0.1-inch EMI system accessories fit existing 3M connectors. The spring latch attachment allows quick, easy connect/disconnect and the intra-cabinet grounding eliminates pigtails/drain wires and need for grounding clamps.