Increase arrow strength and achieve superior front-of-centre with this two-piece outsert. The unique design ensures the assembled components are a perfect concentric fit with each other and with the shaft. For Tomahawk shafts, SIZE 1 fits 250 spine, SIZE 2 fits 275 spine, and SIZE 3 fits 300 spine. Material: Outer Sleeve – Stainless Steel. Insert – Aluminium 7075 T6.