Spring Steel PRO arrow rests reflect Trophy Taker's commitment to designing simplicity and durability into every product. All metal construction, bolts that won't strip or slip and a bullet proof micro adjust system. Spring Steel PRO rests feature an infinitely adjustable blade angle that is secured by two heavy duty fasteners to ensure that once you find the sweet spot, you can truly "set it and forget it." Multiple launcher thicknesses and two different lizard tongue widths are available to achieve the perfect tune. Micro adjustable windage and elevation Infinitely adjustable blade angle All metal construction Heavy duty fasteners and components Blades available in 0.008" 0.010" and 0.012" thicknesses (we recommend the 0.010" thick blade for arrows that weigh between 325 and 425 grains...use the 0.008" for lighter arrows and the 0.012" for heavier arrows). Blades available in Narrow or Wide lizard tongue width (we recommend the Narrow blade for arrows that are up to 23/64" in diameter and the Wide blade for 24/64" and up).