The Thomson Seatpost Collar has several features that make it distinct - 

• The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination
• This fastener combination allows float on both sides of the collar slot ensuring consistent clamping force.
• The bolt hole angle, height of the collar and offset slot all help create a collar that generates maximum clamping force at only 25 inch pounds of fastener torque
• Great looks, great clamping, long life and no squeaking