Features:Applied to the light-weight wooden doors, etc.Constructed from stainless steel, it is durable and wear-resisting for dry residential day by day use. Not recommend use in bathroom and outdoor.This mechanism comes with an affordable inside design, do not worry about felling apart out of the blue when using.With completely satisfied touching and concealed style, it will actually provide you with enjoyable utilization and perfectly performed to complement your decor.Specifications:*Product Name: Door Chain Bolt Lock*Material:Main Body Size: 105mm x 22mm x 30mm / 4.13" x 0.87" x 1.18"(L*W*H)Bolt Size: 15mm x 10mm / 0.59" x 0.39" (Extension Length * D)Strike Plate Size: 41mm x 21mm x 1.5mm / 1.61" x 0.83" x 0.059"(L*W*T)Mounting Hole Diameter: 5mm / 0.2"Mounting Screw Size: 4mm x 15mm / 0.16" x 0.59" (Thread. Dia * L)*Color:SilverPackage Content:1 x Door Chain Bolt Lock1 x Strike Plate4 x ScrewsNote:1. The genuine coloration of the item could also be barely diverse from the photographs shown on web content caused by many points comparable to brightness of your monitor and lightweight brightness.2. Please enable slight manual dimension deviation for the data.