Add Front of Center weight to your wood arrows with the 3Rivers Internal FOC Weight Jig. Designed to make it incredibly fast and simple to drill your arrows to bump up your point weight or nock end weight. This Internal FOC Weight Jig is designed to allow you to precisely drill internal cavities in the point end or nock end of your 23/64" and 11/32" wood arrow shafts. The set includes the jig as well as a 9/64" wide by 3" long drill bit. We offer a 6" long drill bit for added drilling depth. Simply insert the wood arrow shaft, then use a variable speed hand drill (not included) to drill holes in the point or nock end of your shaft. Then insert a weighted rod into the cavity. We recommend using a 1/8" wide rod. See our weighted rods here. The slots are marked 23/64 and 11/32 for convenient identification. The wood arrow shaft slides in 2" for a secure hold to allow for precision drilling down the middle of the arrow. Create accurate internal cavities Perfect for increasing FOC on your wood arrows Includes Jig and 9/64" drill bit Slots marked with shaft diameters for easy identification Instructions included Hand drill and weighted rod not included Read About Crafting Arrows ...read more
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Good concept
It's a really great concept good enough to peak my interest to test it out to see if I should ad it was an option for the woodies I make. Here is the low down... Its great if you are just going to drill 1 inch into the shaft to add a tiny bit of weight. However there is simply too much play in the tolerances of the jig to accurately line up center. I spent a few hours testing… read more and testing but no matter what once I cut into the shaft to see how accurate the drilling was it was always lob sided getting too close for comfort to the outside of the shaft. I was hoping I could get up to 3-4" to act as a footing. If you are just going to drill an inch into the shaft I think you will be alright but nothing more than that.
They are approximately 1 7/8 inches deep.