A great deal of research and development has gone into the KEY-REX™ fastener with the intent to make it a lock. KEY-REX™ shapes are created through an "encryption" process which makes a shape out of millions of variables and defines the "key code" carried by each part. This "key-code" is assigned to an individual user. There is a one time key-code tool and licensing fee. Cold forging is the process used to make the fasteners. Cold forging makes identical parts economically, but it does require minimum order quantities and lead times. Minimums are around 2000 pieces for fasteners and 10 pieces for keys. Lead times are about 4 weeks. Pricing often compares with "tamper-resistant screws" making KEY-REX™ an economical lock.