The 1" 4 blade heads are termed STANDARD because they blow the same size hole as the 3 blade fixed heads that guys are used to such as Thunderheads
Holy CRAP... I better apologize to the last 40 or so deer that died from my substandard Thunderheads since I started using them. It must have been a painful death, I mean....a couple might have gone 70 or 80 yards. And to think, all those arrows that stuck in the ground on the other side of the critters were really substandard. Sheesh.[&:]