Based on my experience, these threading dies were a complete waste of my money. The set arrived with several of the bits already chipped and unusable. The quality of the product is abysmal and does not hold up in an industrial and scientific setting.
I bought these bits to use my gyros rotary tool to create borders for wood carving. The product is good, the bits are sharp and small as you would expect from a Dremel tool. Good buy. They leave a clean cut, but I recommend doing three passes to complete the job. You will need a routing table (I made my own) or a plug-in adapter for the router.
I bought these bits to use my gyros rotary tool to create borders for wood carving. The product is good, the bits are sharp and small as you would expect from a Dremel tool. Good buy. They leave a clean cut, but I recommend doing three passes to complete the job. You need a routing table (I have a homemade one) or a plug-in router adapter.