6PCS Lighted Nocks for Crossbow with .300/7.62mm Inside Diameter Led Nocks Arrow nocks for Archery Hunting

Great quality for the price. easy to install them, just DYI in minutes. use the same one in last two hunting seasons and they are working great.

Given that these are about 1/5 the cost of a name brand lighted nock, they work great! They fit without glue in Mossy Oak bolts from wal-mart, and with a drop of glue in aluminum bolts (note, these do not fit carbon express bolts without a trip to the lathe). From testing, these do not impact the aimpoint at all, and the light turns on every time, but thats to be expected given the simplistic nature of this device. The only downside is the only way to shut these off involves using a metal pick or the included screwdriver to push the button forward via a hole in the side. But then again, if you can't shut it off without tools, neither can the deer! Will update with field use.UPDATE: These have already saved me from losing a stray arrow during target shooting. However, I did have one light where the plastic cap that depresses the switch pushed the switch too far back, and it took me about 10min to get the thing back into place. Good idea to have a spare or 2 on hand if you're practicing/hunting with 6 arrows.

I needed a dozen, so I bought 6 red and 6 yellow. The red ones were much brighter. I have had a couple of them light up on their own sitting quietly by me in their quiver while hunting. I have also had one light up while nocking the bolt in the crossbow. Not ideal, but I can use my pocket knife to switch them off without much trouble. This is much handier for me than trying to fumble with the tiny screwdriver in the field (if I were to even remember to take it with me). The tiny little hole in the nock is especially hard to find in low light, so I advise installing all of them on the shafts in the same relation to the off-colored fletching. That way you don't have to search for it when needed. So far, I would buy again.

perfect fit and work great - very durable

The nocks are very bright. I have the carbon express Pile Driver bolts. And I knew the nocks were going to be too big. So I used a grinding wheel machine and within 5 minutes, I had all 6 done. If you try this go slow and check fitness after every pass of the grinding wheel. As you pass the nock through the grinding wheel spin the nock with your fingers insuring that all sides of the nock get grinded and becareful not to remove the back ridge/edge of the nock that goes seated in the bolt. Hope this helps anyone

They seem great just do not fit pile driver bolts, split my bolt upon install. Bought because I seen piledriver bolts in one of the pictures above and assumed they would fit, they do not.

See them will

These lighted knocks are a lifesaver when it comes to not losing bolt's. Liked the first package I bought so much I bought a second.