Linkboy-Arrow LED Lighted Nock Bolts, Compound Recurve Bow, Hunting, Outdoor Accessories, ID6.2mm, 3 Pcs, 6Pcs

Product description:

High-visibility LED.
60plus hours of battery life.
Bowstring Activated On-off Switch.
Waterproof and shock resistant.
No assembly required.
clear plastic for max light transmission.
Fits for ID6.2 mm arrow shafts.

 weight:25GR
How to use:
Nocks can be inserted to the shaft easily and in fully operational condition. 
Automatically lighted after shooting.No need to use hand to light it first (can be turned on or off by the mini screwdriver)
Package include:
3 x lighted nocks
1 x mini screwdriver