XG Firenock Extreme Shock End Cap packs are custom accessory or replacement packs for G style Firenock lighted nocks.  With installation of extreme shock end cap, your Firenock lighted nock will be able to shoot into hard object: cinder block, rock and most dried out hard wood without being destroyed and your Firenock will stay "Bright Lit".
Contents:
    Standard Packge :
- 3 extreme shock end caps with O-rings
 - 1 installation tool
 
Bulk Package:
- 100 extreme shock end caps with O-rings
 
Note: 
- Gel type super glue (e.g. Firenock AGOGEL, sold separately) is needed to successfully install Extreme Shock End Cap.
 - Clean arrow shaft with acetone before installation of End Cap.
 - Put glue into your cleaned arrow shaft (do not put glue on End Cap / Tool).
 - Insert End Cap with tool straight (rotate slightly may need) into the arrow shaft.