The size of the door flat strike plate is 172mm x 23.7mm,The size is measured manually, there may be an error of about 0.5mm, please carefully confirm the product size. The door flat strike plate for the front door makes it easier to install door openers, no complicated tools required, convenient to use. The door flat strike plate are made of stable and durable stainless steel,with stable characteristics, high reliability, not easy to damage and has a long service life. The square shape striking plates are suitable for 40 mm lock strike boxes, with perforations and cut-outs, for electric strikes, thickness 2.3 mm. Item Descriptions:-The size of the door flat strike plate is 172mm x 23.7mm,The size is measured manually, there may be an error of about 0.5mm, please carefully confirm the product size.-The door flat strike plate for the front door makes it easier to install door openers, no complicated tools required, convenient to use.-The door flat strike plate are made of stable and durable stainless steel,with stable characteristics, high reliability, not easy to damage and has a long service life.-The square shape striking plates are suitable for 40 mm lock strike boxes, with perforations and cut-outs, for electric strikes, thickness 2.3 mm.Package:1Pc Door Flat Strike Plate(Fully Enclosed 172mm x 23.7mm)Item Specifications:Material:Stainless SteelColor:SilverInstallation type:Screw-InRecommended uses for product:Doors