Drill bit sizes?

[Icho]

Jobber length drill bits are pretty much the standard length and most common. They are also usually the cheapest. Taper length are longer so you don't need those unless you need to drill deeper holes. The screw machine length or sometimes called stubby are shorter are sometimes actually a bit pricier even though they are shorter because they are not as common. I find that the shorter the bit the better because it doesn't flex as much and is easier to locate or pick up where I want to place my hole. For knifemaking the jobber is fine but if the price is comparable you can go with the stubby. And after many sharpening a jobber will turn into a stubby anyway.