"The Guard Dog line of low-profile cable protectors, from Checkers Industrial Safety Products, are the most compact top-loading cable protectors on the market. This single-channel cable ramp protects a cable or hose up to 0.75"" in outside diameter. The patented five-bar tread surface provides maximum traction for both pedestrians and vehicles. Available in black or orange, the reinforced, hinged lid makes it easy for you to simply drop your cable into the channel. Dog Bone connectors allow multiple cable protectors to be joined together to protect long runs of cabling."