One screw fastening.

Other Details:

Part No.	Description	Colour	Material	Suits Tube (in)
45500	Heavy Duty Tube Holder	Black	Nylon	3/4"
45501	Heavy Duty Tube Holder	Black	Nylon	1"
45502	Heavy Duty Tube Holder	Black	Nylon	1-1/4"
45503	Heavy Duty Tube Holder	Black	Nylon	1-1/2"
45504	Heavy Duty Tube Holder	Black	Nylon	1-3/4"
45505	Heavy Duty Tube Holder	Black	Nylon	2-1/4"
45506	Heavy Duty Tube Holder	Black	Nylon	3-1/4"