a terminal strip for wiring with 3mm deep recessed octagons, perfect for M2.5 nuts. preferrable to get a better flat-mount of your goods requires nuts and bolts. Im using a few of these to replace blade connectors in my vehicle, and a few for home projects as well. dont worry if you have some bridging troubles in the nut-holes, its just for capturing the nut anyway, so it doesnt have to be pretty! note: Ignore the pictures... I have recessed the nuts on this version! (reused pictures of previous)step 1. print step 2. insert bolt step 3. thread nut onto bolt step 4. attach cabling step 5. tighten bolt/nut step 6. mount. If you want to improve it, add two washers to the nut, and use these washers to sandwich your cables together, making a better fit than screw-to-plastic.