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 is full grinding around the tooth edge ensures better dimensional accuracy and good surface on thread. 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. We have Metric, American, British standard and pther specifications are complete, The standing stock more than 1000000 pieces.