PRODUCED TO BE OPENED WITH A TRIANGLE KEY, ALL PARTS ARE IN THE QUALITY OF OUR OTHER PRODUCTS. OPENED WITH ONE SWITCH. KEY TRUCK SUITABLE FOR LOCK MECHANISM. KEY IS NOT USED FOR LOCKING. IT IS SUITABLE FOR LOCKING THE DOOR TO THE BACK. PRIMARY SCHOOLS HAVE A MECHANISM AND LOCK SYSTEM WHICH WILL BE INCLUDING ALL SCHOOLS IN THE SECONDARY SCHOOL AND HIGH SCHOOL LEVEL. 10 YEARS MECHANISM IS GUARANTEED.