You can adjust the needle tip length in four stages. This allows you to change the depth the needle penetrates the fabric, accommodating fabrics of different thicknesses. This item is new and unused, but has been stored for a long time. The box is old, but the needles are clean. I hope that those who understand this will purchase it. - Brand: Clover - Product Name: Clover Bunka Embroidery Needle Includes threader and instruction manual Thank you for looking.