ALL SHREWD SCOPES ARE MACHINED WITH A RECESSED HEX POCKET TO ADAPT TO A STANDARD ROUND, HEX, OR SQUARE SCOPE MOUNTING ROD. THIS FEATURE IS DESIGNED SO THE SCOPE WILL NOT ROTATE ON THE MOUNTING BRACKET. WHEN MOUNTING THE SCOPE ONTO A SCOPE ROD THE INCLUDED HEX NUT ON THE OUTSIDE OF THE SCOPE SHOULD BE REMOVED BEFORE THE SCOPE ROD IS THREADED ONTO THE 10-32 THREADED ROD. IN SOME CASES THE LONGER 10-32 ROD SHOULD BE SUBSTITUTED FOR THE SHORTER, 1-1/4" 10-32 BOLT INCLUDED IN THE PACKAGING.