Bamboo knitting needles are very lightweight, and have a warm feel for long knitting sessions with less hand fatigue. All of our needles feature laser engraved sizing (in US and mm) for easy identification. The shafts of our needles are perfectly round with uniform thickness within each size. The points are well formed with a gradual taper, and slightly rounded tips to prevent splitting yarns.For best results, before using, and between each project, rub needles briskly with a piece of wax paper. This will put a little bit of wax onto the needle, sealing the grain and making them even smoother to work with.We're confident that you'll be pleased with these needles, so we offer a 30 day money back guarantee, and a 3 year free replacement guarantee. If you ever break a needle, just send us a picture, and we'll get a replacement out to you for just the cost of shipping.