When sourcing a casket lowering device, the most critical factor is the load capacity, which should typically range between 800 lbs to 1,000 lbs to accommodate various casket weights and materials. Look for devices constructed from high-grade stainless steel or chrome-plated brass to ensure corrosion resistance for outdoor use. Additionally, verify the braking system technology; a high-quality centrifugal governor is essential for maintaining a smooth, constant, and silent lowering speed, preventing any mechanical jerking during the ceremony.