1.Lockset is optional 2.Cold rolled sheet steel 3.Electro-static powder coating 4.best service,anti-drill door ... for making door and body.Door thickness: 3-10mmBody thickness: 1-5mm* Internal mechanical locking system by steel. 2>Surface Finish:* Electro-static ... , dark grey, black, and also brilliant blue, red, orange, brown. 3>Idea use:* Home digital safe, household safe, security safe box ...