A tailor's clapper is a tool that helps you get amazingly crisp, flat pressed seams and creases. To use it, you first press your seam with a hot iron and lots of steam. Immediately after lifting the iron, you place the clapper over the seam and hold it down until the fabric cools. This traps the heat and steam in the fabric, making the seam as flat as possible. Tailor's clappers are made out of hardwood. I had a piece of maple hanging around, so I made a clapper at TechShop Menlo Park
. It's a very simple thing to make, so here's what I did.
My piece of maple was about 1 1/4" by 1 1/4" by 12". Clappers are generally about 2" to 3" wide, but I decided to use my skinny piece for now and make a larger one later. I drew a half circle at both ends to mark where I was going to round it off.