Here is a picture of one of our slotted resin blades. The slots can be added to any of our hub less blades and they have proven to significantly reduce smearing of malleable materials such as gold and silver. It also has better cooling characteristics because the cooling water is able to get into the slots making it run cooler over all. The slots can be added to our sintered blades as well, improving their already goon performance on materials like FR4 and plastics.