About Sandhog threading insert We have two types of threaded blades to choose from, one is fully ground, and the other is pressed.about pressed threading insert full grinding around the tooth edge ensures brtter dimensional accuracy and good surface on thread.we have Metric、American、British Standard and other specifications are complete.Compared to full grinding, the circumference of the pressed tooth shape will also be fully ground, ensuring the sharpness and accuracy of the blade, and the production cost will also decrease .Of course, whether it is pressed or fully ground, its chip removal performance and machining accuracy are guaranteed, and different types of blades can be selected based on the actual machining situation.