When sourcing from a factory, you must prioritize the drilling depth capacity and hole diameter range to ensure they meet your project requirements. Key components to inspect include the mast height and lifting capacity, the engine horsepower (typically diesel for remote sites), and the impact frequency of the drilling tool. Ensure the rig uses high-quality alloy steel for the walking beam and pitman arms to withstand long-term fatigue. Additionally, verify the winch system's braking reliability, as this is critical for both operational efficiency and safety.