Mount-n-Lock SafetyStruts Prevent RV Bumper Failure TM (SNU-Universal, Black) ** PLEASE UNDERSTAND PRODUCT BEFORE ORDERING - SOME DRILLING REQUIRED ** Use Selection Guide Image to Match SafetyStruts Version to Your Frame Type If in Doubt, Download Our Lifesize Template from Images Section to Confirm Fit on Your RV View Product Video at youtu.be/W7Ys33KTxHg | Review Installation Guide in Images Section All Versions Include Self-Tapping Bolts for Tube Frames and Matching Nuts for I-Beam Frames