The 72-stitch-function XL-3510 sewing machine features an easy automatic4-step buttonholer with stitch balance control for perfectly uniform buttonholesevery time. It also has conveniences such as an automatic needle threader andautomatic bobbin winding system. Lightweight with a built-in handle forportability, the XL3510 is a truly versatile machine that will be enjoyed byboth the sewing and quilting enthusiast. Main Features Has 35 builtin stitches and 72 stitch functions 4-Step built in buttonholer with stitchbalance control Lightweight portable sewing machine with free-armcapability Quick bobbin winding system Quick set, drop-in bobbin andautomatic needle threading system