I am curious, what is a clapper?

You can save yourself a lot of money by using a 1 or 1.5 inch dowel to iron seams open cover it with some batting and cloth if you want . My husband sharpened one end like a pencil so it is easy to insert in a tube to press the seam open.

I ordered mine from this company and love them! And the company was great - sent them really fast and well-packaged; I recommend them.

I have one thinking it would help with pressing seams open but I find it is just as easy to do that without the strip.

It looks like the Lowe's near me may carry some. I will probably go check it out.

At my local Home Depot the only half round molding was plastic, but I found an even better option in the decorative molding department. Imagine a 1/2" half round on top of a 3/4" wide X 1/4" high flat piece, but it's cut from one piece of wood. Sold by the inch, I bought just a couple feet, which is plenty, and I use it with no covering, just the naked wood. Works wonderfully!

It is awesome to use...especially when your strips such as the jelly roll race quilts, because your seams are so close to each other and you can really press them better..love mine

The first time I saw one of these, I thought just how easy it would be to make them in any length you could want. Then I looked at the price and laughed. Someone is certainly making good money selling them. Joyce in Delaware

I love mine. Use it daily but muslin needs to be cleaned. Not sure about opening up mine and washing the muslin.

Clapper: Several designs: http://www.wardrobesupplies.com/cate...ng-accessories
A lumber yard will have the half round, that's where contractors buy building wood.