Adjustable Durable Door Closer Surface Mounted Automatic Door Spring for Self Closing

This premium door closer features a die-cast aluminum alloy body and heat-treated spring, with powder-coated finish for excellent rust and wear resistance. The advanced hydraulic oil buffer ensures smooth, quiet closing, preventing pinched fingers and frame damage. Dual adjustment valves precisely control closing speed (approx. 3-10 seconds) and force, adapting to various door weights. Package includes full mounting accessories for standard frames, works for both left and right-hinged doors. Commercial-grade durability tested for 500,000 cycles, making it ideal for homes, offices, hotels, and retail stores.