The AeroStab Crossbow Mount for Picatinny Rail, made of 7075T5 ALunimum and Type II Level 3 anodized, as it's name implies, allows for the AeroStab system to be mounted on crossbows with a picatinny rail. Due to its highly precise design, this adaptor can handle a full-blown stabilizer system e.g. dual elbow, three axes for accurate freehand hunting scenarios. Comes standard with a GR5 Titanium tightening screrw.