Milwaukee’s M18 Black Iron Press Jaws can be used to connect 1/2” to 1” Schedule 5-40 black iron pipe. When used in conjunction with the Force Logic Press Tool, the system is optimized for one-handed operation. The Black Iron Press Rings are up to 30% lighter, can be used for up to 2” Schedule 5-40 black iron pipe and feature a unique dual-pivot design for close quarter access. Milwaukee Tool.