Singer 4452 Showdown: Metal Frame Tested, 110 Stitches Surprising We recently reviewed the Singer Heavy Duty 4452, and the first thing that struck us was its robust build. The full-metal frame isn’t just heavy—it’s reassuringly stable, especially when we’re dealing with thick fabrics or heavy-duty projects. Its strong motor delivers impressive piercing power, effortlessly gliding through layered materials without skipping stitches. The 110 stitch applications were also a pleasant surprise, offering versatility for both casual and professional sewing needs—including a handy 1-step buttonhole feature. The LED lights provide ample illumination, making detailed work a breeze. While we did notice some noise at higher speeds, the machine’s performance justifies its power. Overall, the Singer 4452 is a reliable workhorse with impressive features, making it a standout contender in our lineup.