Multiple specifications to choose from to meet daily needs: the ceiling will no longer tilt Straight concentricity, stable hexagonal handle design: high concentricity, not easy to shake High temperature quenching process, sturdy,, and rust proof: high hardness, toughness, and strong hardening Integrated forging, sleeve body made with light alloy steel leveling sleeve: with high hardness, toughness, and strong hardening Horizontal positioning of the leather rings ceiling for more precise leveling, and the ceiling will no longer tilt, Manufacturer: Oxxggkao