Result: knobs

Basically, the small knobs fit into a hole in the factory mats to secure them and keep them from sliding around. | what are the retention devices referred to for these front floor mats? | The factory retention devices mentioned...

The EasyFold XT has a nifty ramp so you can easily load your bike, allows for simple access to your vehicle's rear cargo area via a foot lever that you can press to tilt the rack down, and tightens in your hitch with the twist of a knob. IT also gives you security with integrated locks in the clamps that secure your bikes to the rack and a lock in the knob that secures the rack to your hitch. |

Although the box is typically mounted under the seat, it can be mounted anywhere in the vehicle that allows access to the adjustment knob. I have linked you to an install video showing the InvisiBrake being installed on a 2002 Jeep Liberty. |

You'll want to use butt connectors like the # DW05745-5 to make the connections to the existing wires and you can use one of your existing slots on the dash to install the knob that comes with the Liberty. If you don't already have a 7 way plug on your 2008 Hummer H3 you'll want to use the # ETBC7, which will provide you with the 7 way plug-in required for your trailer brakes and lights to operate. |

This rack will install on your Insight as follows: set the Fit-Dial knob to number 8; place top clips in the gap at the front edge of the top of the trunk; place lower clips in the bottom edge of trunk; the side straps can be positioned on the side edges of the trunk. |

Pro Tip: Spay some lubricant like WD-40 or PB Blaster on the rubber isolators to make it easier to remove the hanger knobs. | I purchased the replacement CURT trailer hitch hardware from eTrailer for this hitch and installed...