This extra long 47mm screw is custom made in the USA to KNEKT's exacting standards. To our knowledge it is the longest GoPro screw you can buy. This length provides more to hold onto when you really want to crank it down tight. Precision CNC machined from marine grade aluminum and stainless steel the KLS thumb screw is durable and super light. It is a compatible replacement for your original GoPro screws. Works with all KNEKT Triggers EXCEPT THE ORIGINAL GP3.