hss drill bits has a few types,multifork drill bits is one of it.
multifork drill bits (MFD) has special point angle,and cutting edge is curl,
it make drills can drill more fast and stable,and scrap is more easily
to be discharged.so that to increase drill's working life.
if you want to know more about MFD drill's advantage,pls be
kindly to contact with me