Features: The lock cylinder and key are made from premium copper material Out outer shell and handle are constructed from zinc alloy material, sturdy and durable High precision and fine workmanship Adjustable latch to fit 2-3/8"(60mm) or 2-3/4"(70mm) backset Fits all doors 30mm to 50mm in thickness Comes with 3 keys Specification: Color: As Shown Lock Cylinder Material: Copper Key Material: Copper Installment Center Distance: 60mm or 70mm/2-3/8" or 2-3/4"(Adjustable) For Door Thickness: 30-50mm Note: Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting. Thank you for your understanding, nice day! FAQ 1.If i have my thoughts, do you have person to design according to my concept? > Certainly,our design team is willing to do for you. 2.How long to make a sample? > 3-15days which depends on the samples' complexity. 3.Is the sample fee refundable or not? > Sure, refundable once order confirmed.