In case you don't like using the Clam Kit to duplicate keys, some OOMOO 30 silicon rubber and Smooth-Cast 300 plastic resin will allow you to make plastic keys. The only additional supplies you'll need is some plastic cups, spoons, a toothpick and a key. Both products are extremely easy to work with and are less expensive. Plus when you make a silicon mold of a key you may cast as many plastic keys as you want from the same mold without degradation or distortion. Using silicon rubber and plastic resin allows a person to mold and cast any high-security key, unlike the Clam Kit. The plastic keys are durable and strong enough to move the tumblers and turn the plug. If you want to make a set of plastic bump keys (i.e. hammerpicks, 999 keys, knockers) or if you want to make some blank plastic keys for impressioning, I recommend using a harder plastic resin, such as Task
- Pin marks left on the plastic blank show up like a neon sign and the plastic is easy to file and cut.