When sourcing a coffin lifter, the most critical factor is the Load Capacity, which should typically range from 1,000 lbs to 1,500 lbs (450kg - 680kg) to ensure safety for various casket weights. You must also verify the Lifting Range, ensuring the minimum height is low enough for floor loading and the maximum height reaches at least 35-40 inches for vehicle or rack transfer. Look for Heavy-Duty Steel Construction with a powder-coated finish to prevent corrosion and ensure long-term structural integrity.