12 Months Warranty\n\nFree UK Delivery\n\n***Brand New***\nFeatures | Singer Heavy Duty 4423 Sewing Machine \nDesigned for sewists tackling heavier fabrics and demanding projects,\n the Singer Heavy Duty 4423 Sewing Machine delivers power with a motor \n60% stronger than standard models. Named an award winner in 2025 by \nWhich? magazine, this acclaimed machine combines robust performance with\n speed, stitching up to 1100 stitches per minute to complete tasks \nfaster. With 23 built-in stitches including a 1-step buttonhole, it is \nideal for intermediate and experienced users working on denim, canvas, \nupholstery or multi-layer garments where standard machines struggle. \nThe\n 90-watt motor ensures consistent stitch quality through thick seams, \nwhile the automatic needle threader reduces time and setup frustration. \nDrop-in bobbin design with automatic winding simplifies thread changes. \nTwin needle capability allows decorative detailing, and 3 needle \npositions support5