Key Holder

Basics This works like a swiss army knife with your keys folding into the holder. Each holder is designed to have an equal number of keys at each end. The center bolt keeps the keys from crossing onto each other (you can remove it if you want). Fit as many keys as you want, you will just need a long enough set of bolts. 3 Sizes to print Regular - common key sizes, house, mailbox, car, etc. Large - industrial, heavy duty locks, keys you can't buy in a hardware store Extra Large - usually old fashioned style keys, but who knows what else you can fit on this? ... it's big Bolts/Nuts 3mm (M3) 4-40 (Imperial UNC) 4-48 (Imperial UNF) Knurls M3, 5mm outer diameter, 4mm height Search ebay.com/aliexpress.com/amazon.com for the proper sized knurls Designed for 3mm (M3) bolts and nuts there is equivalent imperial (USA) sizes available. If you want the strongest and most reliable design you will need to use the Knurl option. These can be obtained from Ebay.com very easily. Search for M3 Knurls and ensure that they are 5mm outer diameter and 4mm in height. There are varying knurl sizes if you aren't careful. To put them in you can use a soldering iron to just melt them into the slots or use a heat gun to heat them on a bolt and then insert them. Check the video (coming soon) for a visual guide. Materials Needed PETG, HTPLA, or ABS are preferred. Anything stronger works too. PLA may be too weak for regular use. 3x bolts 3x nuts or knurls (If you don't know what a knurl is then look at the pictures. You can buy them in packages online. Check image for knurl dimensions needed) Bolt Lengths Measuring the thickness of the keys you want to put into the key holder + 7mm will give you the length of bolt needed. example: 4 keys with 2 at each end (pictures). 2 keys total width is 6mm + 7mm for keyholder body insets = 13mm to 14mm bolt length. Knurl Sizes There is a picture with the suggested dimensions of the Knurls. 3mm knurls have varying dimensions based on manufacturer. They won't wo