Simply send me a message if you hope to win a few more auctions outside of that 5 day period. Tag words Machinist, Metalworking, Indus Surplus, Machining Tools. Weldon b&s nmtb40 tool holder lot end mill boring bar 40 taper machinist sharpe this item is in the category business & industrial\cnc, metalworking & manufacturing\workholding & toolholding\toolholding\adapters & holders\rotary tool adapters & holders.