Automatic sensor door lock without hole Automatic closing of all doors

Suitable for doors, or doors with slightly stronger closing force. Left and Right Opening Doors, Metal and Wood Doors, Residential and Commercial Doors, Exterior/Interior Door Closing,.
Anti-oxidation, anti-corrosion, no rust, stable, wear-resistant, weather-proof, hydraulic, quiet, safe shutdown device.
Specifications:
Material: ABS
Product Size: (L x W x H) 6.3 x 6.3 x 1.6cm