drill bit

[Bill S]

I have been practicing sharping drill bits by hand. No luck holes are not round. So I was thinking about getting a Drill Doctor. They have the one that does only 118 degree angle and one that does 118 and 135 degrees. How often do you think a bit with an 135 degree would be needed? The cost between the two is about $35.00 more for the one that you can put a 135 degree angle on the bit. I do some projects using bed frames that seem like a harder seel than mild steel.

Thanks