what do you use left handed bits for??? undrilling a hole?
i worked construction for many years and have many long drill bits in my collection
some 9'' and some 12'' long; 1/4, 3/8, 1/2 and 3/4 have never seen a full set just individual bits
many are electricians bits for chasing wires through headers
and then there's my 18'' long 7/8'' auger bit for running romex, made for wood but it cuts nails and anything else in it's path
harbor fright has a lot of 25'' long wood bits and sets
http://www.harborfreight.com/25-long...ece-68823.html