Features: 

• 50lbs working load
• Break-strength 150 lbs
• Holds objects 1-3/4" to 2-1/2" in diameter
• Made Of Heavy-Duty Transportation Grade Rubber
• Mounts easily with two 1/4'  bolts or screws
• Mounting area: 1" x 3-1/2" 
• Includes 1 clamp