In the early 1800s, two men were required to work a lumber saw by pulling and pushing, back and forth. But thanks to a woman, the process became much simpler. In 1813, Tabitha Babbitt created the circular saw! Babbitt's saw was circular so that the teeth would continue cutting, unlike the straight saws that only cut on the pull, and not the push motion. We also commonly use her other building innovations, like machine-cut nails instead of individually hand-crafted nails. As a Massachusetts Shaker community member, she helped create tool innovations for furniture making. It's said that while she lived a simple Shaker life, Babbitt never applied for patents.