The GrovTec Non-Rotating Flanged Base is a precision-engineered firearms adaptor designed for hollow stock installations with stainless steel construction for maximum durability and reliability.GrovTec Non-Rotating Flanged Base AdaptorStainless steel construction for corrosion resistanceSecure installation with 3 set screwsIncludes retainer nut for stable mounting on hollow stocksNon-rotating design prevents loosening during useIdeal for hunters service members and shooting sports competitors who demand reliable American-made firearms accessories that deliver consistent performance in demanding conditions.