For the past 2 years or so I have been interlocking aka latching my roots with a size 13/16 metal yarn/tapestry needle. These needles can be purchased from almost any craft store. I found mine at Micheal’s in a package of 4 for $3.30 including tax when I first got them and I just purchased another package of 2 today for the same price. So, that means the price has gone up but it’s still much much cheaper than the Nappylock tool. You might be able to find a larger size so you won’t have to modify it but that’s the only size I’ve been able to find in my neck of the woods.
First let me say don’t get nervous about this being a needle. The business end is rounded so there are not sharp edges or points to damage or snag your hair. Those of you with micro interlocs might be able to use the needle as is. Also it was too long for me to use on my locs when I first purchased the needles at about the 1 year mark. You probably can make it shorter by sawing it down with a hacksaw but I did not want to do that because that was extra work. lol So I waited until my locs got a bit longer. For me, at the time I started using it my locs at about 15 months were still in the budding/swelling stage especially the ones in the back so I had to make the eye wider. It’s super easy to do however it does take a bit of patience. I’ll confess that I broke two of the needles…that’s how I learned that it takes patience to get it right. lol
What you’ll need for this project is:
- A metal yarn/tapestry needle.

Of course right?! This reminds me of how my grandmother would give my mother recipe instructions. She’d write in her letter (the recipe was an integral part of the body of the letter) saying, “If you don’t already have (the main ingredient of the recipe), go to the store and get it.” If it was frozen she’d say “unthaw x”. If x ingredient was in a can she’d say “get the can opener and open the can”. For some reason this was always absolutely hilarious to me, I guess because you’d have to really be an airhead not to understand her instructions.
- Needle or round nose pliers.
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Image via Wikipedia
An alternative is a small flathead screwdriver.

Image via Wikipedia
Note: If you use a flathead screwdriver instead of the needle nose/round nose pliers, then add an extra dose of patience.
Step 1.
Open the pliers and with your palm facing the floor insert the tip of the pliers into the middle of eye of the needle.

Step 2.
Slowly and gently turn the pliers to the left or right, whichever direction is comfortable for you.

Step 3.
Remove the pliers and repeat steps 1 & 2 inserting the pliers further into the eye of the needle until the eye is large enough to fit your largest loc.
It’s important to remove and re-insert the pliers to do it like I said because it forces you to increase the eye a little bit at a time. Trying to get the eye wide enough all at once will result in breaking the eye. Even more so if you are using a flathead screwdriver to do this. Remember earlier I said that I broke 2 needles? This is why. 🙂 Fortunately @ $3.30 for a pack of 4, that means each needle is about $.83 (price based on the first set purchased) and $1.66 each (based on the more recent purchase) so I don’t feel too bad about it.
Here’s the final result. 
That wasn’t so bad was it?
If that was not clear and you are able to view video, here is the video I did for my YouTube channel.
Let me know if you use this and how you like it.