Killer Instinct Crossbow Arrow Bolt Retainer Retention Spring Brush Kit 2

Killer Instinct SPK-RBRUSH-2

This kit will convert your crossbow that used spring retainer 3 to a brush.

Killer Instinct Replacement Brush Kit

Includes 1 brush kit as pictured

Holes Roughly 1.5" apart center to center 

upper plastic is about .42" thick