Spring Steel Pro with multiple launcher thicknesses and two different lizard tongue widths are available to achieve the tune.
Blades thicknesses available in .008", .010" and .012".
The .010" thick blade is ideal for arrows that weight between 325and 425 grains, use the .008" for the lighter arrows and the .012" for heavier arrows.
Blades in narrow and wide lizard tongues, narrow width for arrows that are up to 23/64" in diameter and the wide blades for 24/64" and up.