Check the listing for details. RAM-B-231Z-366U RAM Handlebar U-Bolt Mount with 1/4"-20 Threa.... Color: Black, Condition: New. Listed at 50.94 USD. RAM Handlebar U-Bolt Mount with 1/4"-20 Threa... RAM-B-231Z-366U Genuine RAM Products! The RAM-B-231Z-366U consists of a zinc coated u-bolt base, double socket arm and 1 INCHES ball, connected to a round plate with 1/4 INCHES -20 camera thread. Included in this package is hardware that will accommodate rails from 0.50 INCHES to 1.25 INCHES in diameter. The base includes black cover caps to be placed over the exposed ends of the u-bolt. The included composite rail adapter can narrow the rail to a minimum width of 0.5 INCHES . The male 1/4 INCHES -20 threaded steel stud will connect to any standard female thread found on camcorders, digital cameras and POV cameras. The mount is designed with a RAM 1 INCHES diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles.hardware included (1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) 1/4 INCHES -20 Nylock Nuts(2) Rubber Caps(1) U-Bolt Spacerclamp range .5 INCHES - 1.25 INCHES diametersocket to socket length 3 INCHES ball size B Size (1 INCHES )weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lbmaterials Marine-grade aluminumHigh strength compositepackaging type Poly BagWeight 0.6 lb hardware included (1) 1/4 INCHES -20 U-Bolt for .5 INCHES - 1 INCHES Rails(1) 1/4 INCHES -20 U-Bolt for 1 INCHES - 1.25 INCHES Rails(2) 1/4 INCHES -20 Nylock Nuts(2) Rubber Caps(1) U-Bolt Spacer clamp range .5 INCHES - 1.25 INCHES diameter socket to socket length 3 INCHES ball size B Size (1 INCHES ) weight capacity Standard Use: 2 lbsHeavy-Duty Use: 1 lb materials Marine-grade aluminumHigh strength composite packaging type Poly Bag Weight 0.6 lb