Carbon steel 45# boron steel 30mMnB is a pretty suitable and widely used for end bit, we are only one G.E.T. factory 

who also doing steel trading business directly, based on 20 years purchasing steel with Chinese top 

steel plant, annual purchsing 600,000 tons so we can alsways get the quality material with the lowest 

price, all material original mill certificate can be provided.

In addition, all the equipment we use is world advanced, Germany laser plasma cutting machine, CNC 

multiple drilling& punching machine,  large heat treatment line from Canada, ensure all blades and end bit

"through hardened",so blades and bits are more wear resisting.