All our canopy snap fasteners are genuine DOT brand. The real McCoy of the fastener world. These particular collection are the 304 stainless range. Perfect for fresh water environments. 

Specification
Made from Heavy stainless steel 
Stainless Spring in stainless Product 
Simple "Snap-on" "Pull-off" Action
By Hand Tool or Machine
Heavy Duty Spring Limits risk of unwanted detachment
Complete Range of Terminations available for all

Products available

Brief explanation of each type

Cap - The Cap fixes to a Socket and can then be attached to a stud

Socket - The socket attaches to a Cap and can then be attached to a stud....

Stud - These can be attached to the deck via screws , rivets etc.... Or you can attach to a Post so you can have a piece of canvas attach to a piece of canvas

Post - To be used with the studs to create a fixing point on a piece of canvas

 We have a fitting guide here https://www.jclarkemarine.com/blogs/news/116334725-what-are-snap-fasteners