When sourcing tools for PEX-AL-PEX (Multilayer) pipes, you must prioritize compatibility and precision. Ensure the crimping tools or press tools match the specific profile of your fittings, such as TH, U, or H profiles, as using the wrong jaw profile will lead to leaks. Look for pipe cutters with high-carbon steel blades to ensure a burr-free, 90-degree perpendicular cut, which is critical for the integrity of the aluminum layer. Additionally, reaming and beveling tools are mandatory to ensure the pipe end is rounded and chamfered, preventing damage to the O-rings during insertion.