Irwin Speedbor 1 3/8 in. Dia. x 6 in. L Carbon Steel Wood Boring Bit 3/8 in. Quick-Change Hex Shank

from Jimmy r

The bits with 3/8" shafts were perfect, the bits with the 1/4" shafts are junk.Don't you people read the reviews? Not only do the shafts break with a cordless but the screw tip at the end is too sm...

from solaeros

As an electrical contractor I go through a lot of wood boring bits. When these first came out they had a 3/8" shank and they Rocked!! Now they've gone to 1/4" shanks and are no longer suitable for ...

from Montana Electrician

They used to be great bits when they had a 3/8” shank. They are garbage now, 1/4” shank twists right off.

from John 66

I purchased a 3 piece set of speedbore max bits recently , needing to bore 3/4 in. holes through 1 1/2 in clear pine for dowels. Using bit in my drill press, after about 12 holes the bit would no ...

from BIGJim

I have used these bits for years,mostly 7/8" and 1" . They were great when they made them with the 3/8" shank, but the 1/4" shank just shear off. I went through 3 of the 1/4" shank 1" bits yes...