37 Unique built-in stitches: The GX37 features 37 unique built-in stitches and an auto-size buttonhole. Automatic needle threader and drop-in top bobbin: This sewing machine includes an automatic needle threader that perfectly pushes thread through the needle and a convenient jam resistant drop-in top bobbin. Versatile free arm: The Brother GX37 is perfect for a range of everyday sewing and quilting projects for every user from beginner to the advanced.