Horizontal 2x4 ( C - brackets) Connect two of our steel 2x4 Top Mounts or 2x4 Target Stands together with our C - Brackets and a horizontal 2x4. Once connected, this system provides a stable way to mount several targets of your choice by using chains, horizontal 2x4 mounts or our 2x4 AR500 steel hook strap kits . (Targets & target mounts not included) Disclaimer Buyer assumes all responsibility for the use and misuse of the purchased steel targets.