... rolled steel sheet 3. electrostatic powder coating J3 Mechanical Safe Material :high quality cold rolled steel sheetBox body ... drawer .Roller :anti-noise nylon roller ,reduce friction with ground.Lock system :1.multi cross shafts,using solid core ... way or force ,box will re-lock itself.4.Password lock ,mechanical lock ,which is drill-proof ,smash-proof ... .31311331-drawer,1-shelf J3 Mechanical Safe