This scope rod is CNC machined from 6061 aluminum and internally threaded for 10-32 bolts, with a durable black anodized finish and laser indicator marks. Its square end fits into Shrewd scope snugly for a secure attachment that will not move. The rod is 2.5" long and gives plenty of room for horizontal adjustment. Specifications 1/2" scope rod fits: Axcel CX, Axcel CXL, Axcel AX2000, Axcel AX3000 , Axcel Accutouch, Axcel Accutouch Pro, Axcel Achieve XP, Axcel Achieve CBL, Axcel Landslyde, Axcel Accuhunter 3/8" scope rod fits: Spot Hogg Fast Eddie, Spot Hogg Fast Eddie XL, Spot Hogg Hogg Father, Sure-Loc One 400, Sure-Loc One 550 Be sure to remove the Hex nut from the 10-32 bolt on the scope before threading the scope rod in The square end of the scope rod will locate within the machined pocket on the outside of your Shrewd scope to prevent the scope from rotating