These are High Quality German Groz-Beckert Needles which are 46 Gauge with 6 barb on them.
They will take a few Hairs per follicle, the needle is a fine triangular shaft and you will find 6 barbs, 2 on each apex. Unlike other needles this has the barbs all on the same level of the shaft. If you require the rooting tool I also sell them as well in my store under tools.
I have sourced a very top quality product which you are sure to love. If you have any questions please do not hesitate to contact me