Padlocks UNION offer a range of padlocks covering all levels of security, suitable for both commercial and domestic use. A number of considerations should be taken into account in order to select the most suitable padlock for your application. Please contact UNION Customer Services for further advice. Download Padlock Look Up Table (.pdf, 2.6 MB) High Security PadlocksUNION offer a wide variety of high security padlocks tested to the highest standard and sold secure accredited. C-Series PadlocksTough and robust the heavy duty C-series padlocks from UNION are both Secure by Design and Sold Secure accredited. Brass PadlocksUNION offer a range of traditional general use brass padlocks for a variety of applications.