Description The CMI Archery 5MM SS HIT Insert is a precision stainless steel insert designed to enhance arrow durability, front-of-center (FOC) balance, and overall performance. Built for 5mm (micro-diameter) arrow shafts, this HIT (Hidden Insert Technology) system installs inside the shaft for a streamlined profile that improves arrow flight and broadhead alignment. The stainless steel construction adds weight up front for increased penetration and durability, making it ideal for bowhunters seeking improved impact performance and consistent accuracy. Specs Weight 25 or 50 gr Material Heat-Treated 416 Stainless Steel