What Does Blade Style Mean?
#1 blades are the most narrow and #3 blades are the widest. The #1 and #2 blades are the most popular, with the #2 being a hair more popular.
Over the years, players have made all kinds of alterations to their picks (and their technique) to make them work better. Angled blades allow you to hit the strings squarely with minimized finger movement, so you get a boost of tone, speed, volume, and reduced pick noise.