Set of (4) Polaris Lock & Ride Type Large Knob Kit for Sportsman, RZR, ACE & ATV's Lock and ride knob type expansion anchors and fasteners for Polaris Sportsman, RZR and other ATV's with a 1 inch diameter hole. Keep your gear secure. Simply turn the fastener until tight and you're done! Expanding anchors fit tight and allow you to add and remove accessories as you wish without attaching them permanently. Each set includes: (4) 5/16" x 3" machine screw knob fasteners with 2-1/4" diameter knob. Please check your ATV to make sure these 1" diameter fasteners will work for your application before ordering. This product does NOT fit Polaris Ranger or Polaris General Lock & Ride holes. Check out our other listings for additional kit options!