Greenland style paddles have become popular among kayakers. Not only do these beautiful paddles have a long tradition, but they have definite performance advantages as well. You can read a lot of articles on these paddles:
Like any kayak double paddle, there are distinct advantages to adding ferrules so that Greenland paddles can be broken down - including transporting and stowing a spare paddle. Here is an article specifically addressing adding these ferrules to a Greenland Paddle:
We have to thank David Glasgow for working with us to develop this product. He wrote to us early in 2014 asking for a larger version of our standard CF ferrule. After a few emails back and forth we hit on a size and the first order of 100 ferrules was placed. Since then we have sold many ferrules without a single complaint.
These ferrules are custom made for Duckworks to exacting specifications. You will not be dissappointed by the workmanship or appearance.
There are other uses for these ferrules too, such as for pushpoles. Read Rob Rohde-Szudy's article on using a ferrule with a wood pushpole.
Details for Greenland size ferrules:
The Greenland size ferrules are 35.81mm ID
and 38.6mm OD x 14" long. No screws are included - they can be
epoxied to the shaft of your paddle.
These ferrules weigh 5.75 oz.