Door thickness - 28 mm to 40 mm. Mortise Door Handle. 48.5 mm distance from the edge of the door to the keyhole. Key operation from both inside and outside. Our Products are prepared by the consummated and professional surface treatment and anti-corrosion technology. These products are manufactured in agreement with set industry quality norms using high-grade raw material and advanced technology. To these products, we source supreme quality raw material from dependable merchants of the market. Before buy, any products see the below features, which are only given by ALCOTT and these features make us unique to compare competitors. Design: unique design to make product royal and long life, Anti-rust, anti-junk material, and design for a long time, Easy to use and install the product.