ST Trading supplies padlocks, furniture and door locks and lock cylinders – for manufacturers of furniture, doors, cabinets and mailboxes, and for installers. Range Padlocks – standard, long shackle, sliding shaft and combination Drawer locks and central locking systems Mailbox locks Cabinet door locks with knob Mortice door locks – cylinder, room and WC Rim locks, including electric rim locks Glass door locks Lock cylinders Dimensions and materials of each lock are listed in the PDF catalogue. Catalogue Download PDF catalogue Need a quote? Send us your list of parts (standard, size, quantity) or a drawing and we will get back to you. Request a quote How to choose a lock Furniture and drawer locks are selected by door thickness, mounting method and the required key rotation. Mortice locks are selected by centre distance (between the handle axis and the cylinder, key or bolt axis) and backset (from the handle axis to the lock forend), and lock cylinders by the dimensions measured from the fixing screw axis to each end, taking into account door thickness and the hardware on both sides. For padlocks, body width, shackle diameter and length, and indoor or outdoor use all matter. For larger orders it is worth agreeing whether locks should be keyed differently or keyed alike for a group. Frequently asked questions How do I measure a lock cylinder? Measure from the axis of the fixing screw hole to the outer and to the inner end of the cylinder. The sizes are chosen to suit door thickness and the hardware on both sides. What is the difference between a mortice lock and a rim lock? A mortice lock is fitted inside the door leaf, a rim lock on its surface. The choice depends on the door construction and use. How do I choose a padlock? Consider body width, shackle diameter and length, and where it will be used. For outdoor use, choose versions designed for outdoor conditions. What information should a lock enquiry include? Lock type, dimensions or catalogue codes, keying requirements and quantity. The contact form lets you send your full list in one message.