Name: WC indexable insert Drill (U Drill)
3D mean the machining depth is 3 times the diameter.
Material: Special High Strength Steel.
Package Included
NO INSERT:
How to choose U DRILL
Difference between SP bit and WC bit:
SP U Drill:The bottom hole of SP insert is flat relative to WC, but not completely flat. SP insert is square and can use 4 cutting surfaces, with a better finish than WC.

If you need other specifications, please contact me.