The Montec M3 has a higher grade steel that is not only super tough, but also makes a sharper edge. One solid piece of 420 high grade stainless steel with no vents provides quiet flight and also added strength and durability. With the same reusable, easy to sharpen design, the new Montec M3 is Designed To Hunt. Product Features 1.0625" Cutting Diameter 100% Spin Tested BMP Practice Head Available Available in Crossbow Model 100 Grain Only