Fits Trophy Taker rests and other models that host this blade type fitting Launchtec Features: British made product Made from aerospace quality epoxy composite Higher resistant frequency than spring steel Consistent performance on every shot Less chatter on the draw Very quiet on the draw These blades do not rust like metal blades No sharp edges that can damage carbon shafts Very resilient Several options available depending on rest type and arrow shafts being used Narrow and Extra Narrow equivalent to 0.010 and Wide 0.012 stiffness Sizes Info: Narrow--Most carbon shafts and alloy shafts up to 20 diameter(Most Popular) Extra Narrow--Most small diameter carbon shafts 5.2mm and less Wide--Most bigger diameter alloy and carbon shafts 21 size and bigger More precise info on these blades and tuning tips, visit the Launchtec Website Launchtec Website