rolling shutter door lock : We are the manufactory of this lock. 1.material : iron 2. 3computer keys 3. brass cylinder head 4.lock body size :15.5*5.5*1.8 cm 5.packing:each in poly bag and then in paper box , 50 pcs /ctn. 6. packing size :45.5*24.7*18.8 cm 7. diameter of the cylinder :2.5 cm . the highth of the cylinder: 1.8 cm. ADD :F2-13018 , Futian market , yiwu , China . Tel : +86-579-85193017