Premium Aluminum Alloy Construction: Made from high-quality aluminum alloy with a metal gear shaft for durability and resistance to deformation, ensuring long-lasting use. The smooth, polished surfaces prevents scratches on shoes. Effective Shoe Stretching Solution: Addresses common discomforts like tightness and rubbing with a four-heads machine that adjusts shoes for a better fit, enhancing comfort and wearability. User-Friendly Operation: Attach shoe lasts, place shoes, and adjust using hand grips. Achieve optimal stretching in 24 hours, or reduce time to 8-10 hours with a hot towel or soft leather oil. Versatile Shoe Compatibility: Suitable for men's sizes 8.5-11 (42-45), women's heeled sizes 4.5-10 (35-42), and children's shoes. Ideals for home, repair shops, stores, and factories. Maintenance and Usage Tips: Apply lubricating oil to screw parts for smooth operation; avoid excessive force to prevent slippage. Maximum stretch is 6-7 mm; recommended for real leather shoes only.