1. Cut the pipe to the appropriate length 2. Drill a hole all the way through both walls of the pipe at its midpoint (or thereabouts, depending on the differing armspans of the two who will be using it) 3. Pass a bolt through both holes 4. Secure the bolt 5. Cut a length of chain to fit around your wrist and reach up to the bolt 6. Fasten a carabineer to the chain by which to secure it to the bolt 7. Repeat steps 5 and 6 for the person who will share the lockbox with you 8. Fortify the lockbox The construction of lockboxes can be a fun group activity. Make sure the people who are going to use the boxes try them on and modify them according to arm length and other variables. How much of your arm goes inside a lockbox is a matter of preference and tactical strategy, but on average your pipe should be about 4’ in length. The more of your arm is covered by the PVC pipe, the more of your body is safe from police action. For example, if your bicep is exposed, the police could attempt to use pain compliance there to force you to unlock yourself; if your entire arm is in the pipe, this is impossible. Everyone’s arms are unique. If you are locking down, you need to be able to put your arm far enough into the pipe to grab the bolt, so you can easily connect and disconnect your carabineer. If the people who are to use the box can be present during the construction, measure their arms and custom-fit the pipe. If this is not possible, build the box to a length that almost anyone can use—say, between 3’ and 4’. If you are using PVC pipe, it can easily be cut with a standard hacksaw. For more long-lasting lockdowns, use more durable piping. It’s important that your pipe be the right diameter; you should be comfortable sliding your arm in at least to your bicep. Unless your arm is extremely small or large, the pipe should be between 4” and 6” in diameter. After the pipe is cut so that both people who are to use it can put their arms in as far as they want and touch fingers, secure a bolt at the point where their fingers touch. The length of the bolt should be longer than the diameter of the pipe; if you use 5” pipe, make sure your bolt is at least 5.5”. Stay away from bolts with sharp threads or a sharp point on one end, unless you are prepared to modify them for safety and comfort. Your bolt should be thick and difficult to cut; it will probably be the weakest link in the chain, so you’ll want to be careful to make sure it’s as secure as possible. Drill a hole all the way through one wall of the pipe and out the other. If you have to drill the top hole first and then flip the pipe to drill the bottom hole, make sure the holes line up! Put the bolt through both holes. It should be slightly off-center in the pipe, so the person locking to it can fit their fingers around it and have space for their knuckles. Now use nuts to secure it in place; these can go inside the pipe, or outside it, or both. You can use powerful glue to strengthen the bolt; better yet, if you have the means, weld it into place. You could include multiple bolts in your design, to make it harder for the police to know where to start. If you have more than one bolt, you can also experiment with attaching yourself to all of them. Now you have to build the chain bracelet that secures you to the bolt inside the pipe. Cut a length of chain that can loop around your wrist at one end, and attach at the other end around the bolt in the pipe; it will be in the shape of a P. Experiment with chain length until you have a comfortable fit. Make the clasp that holds the chain around your wrist permanent and durable; use a carabineer to clasp the chain around the bolt, so you are able to unclasp from the lock box in an emergency. Attaching the chain to the central bolt with a carabineer is a very secure and safe option, but there are others. For a simpler, though weaker, variation, skip the central bolt entirely and run a length of chain through the tube to attach your wrist to the wrist of your partner. This option might be useful if you have limited time and funding to prepare for the action. A benefit of the central bolt is that when you are pulled, the bolt absorbs some of the force, and gripping it can provide some control; if you are connected to another person by a chain directly, and one of you is pulled or dragged, both of you will bear the brunt of it. Once the device is assembled, the holes drilled, the bolt secured, and the chain attached, make sure it all fits comfortably. Put some padding around the chain at your wrist, and pad the entrance to the tube if need be. If nothing else, wrap the chain in an old sock or two, and sand down the edges of the pipe to prevent it from cutting your arm. The final step is to fortify your creation. Many police departments now understand how lockboxes are constructed and know how to disassemble them. This does not mean locking down is ineffective, since it still takes the police time to react, retrieve the necessary tools, and cut apart each lockbox; but it is worth brainstorming about how to stay ahead of their technology. The police are likely to try to cut the pipe to expose your hand and the carabineer, or attack the box at the bolt. Consider ways to slow this process. You could wrap the lockbox in materials that dull saw blades, for example, or wind layers of duct tape and wire around it, or cover it in viscous tar and sand, or weld rebar armor to it—or do all of there! The more layers of material that require different forms of cutting technology, the better. For heavy lockboxes that can anchor you in place, you could put a layer of concrete around your pipe, and a layer of plastic or aluminum drain tubing around that.