【Universal Application】 This set of two triangular key wrenches featuring double and single ends complement each other , usable as fire brigade keys , cabinet keys , and postal keys . Ideal for installing guardrails , bollards , and lock systems , easily mastering any 19 millimeter triangular opening 【Refined Design】 Our double end and single end wrenches measure 17 centimeters in universal length with 2 centimeter inner diameter heads . The triangular shape facilitates portability , fitting comfortably in pockets or toolboxes . Compared to other products , this tether wrench reduces thickness by 2 millimeters , significantly decreasing weight . This design not only enhances portability but also makes extended work periods easier without compromising functionality or stability 【Steel Material Construction】 This tether wrench is made from steel , offering rust and wear resistance that significantly extends service life . Capable of withstanding the harshest environments , it remains your reliable partner for years 【Versatile All Purpose Key】 Thanks to sturdy welding , these double and single end wrenches withstand various loads . Suitable for continuous use . Note : Please confirm size compatibility with baffles before purchase , otherwise the triangular wrench may not function properly 【Professional Triangular Wrench】 Our M12 triangular wrench is specifically designed for 19 millimeter locks , ensuring ideal fit . Ideal for fire key applications , security personnel , and anyone requiring reliable access, Manufacturer: PATNFR