Easton Broadhead Adapter Rings - BAR 8 For use with Easton ACC size 3-71, Flatline all spine sizes, and PowerFlight all spine sizes, All Beman ICS sizes in the ICS Hunter Elite, ICS Hunter, ICS Camo Hunter, ICS Bowhunter, and ICS Hunter Junior. Use the BAR if required by broadhead design. Fixed broadheads that utilize the face of the insert to support or hold the blades in place require BARS. Mechanical broadheads that use the insert or a thin metal washer as a stop for the blades after opening require BARS. Each Easton Broadhead Adapter Ring weighs 5 grains each.