When sourcing PEX tools, prioritize compatibility with specific PEX types (PEX-A, B, or C). Ensure the tool supports the required connection method, such as ASTM F1807 (Copper Crimp Ring), ASTM F2098 (Stainless Steel Clamp), or ASTM F1960 (Cold Expansion). Look for tools made from hardened tool steel with chrome plating to prevent corrosion. For manual tools, a long-handle design is essential to provide the necessary leverage for high-torque crimping, while battery-operated hydraulic tools should offer a press force of at least 19kN for efficiency.