Use the Spade drill bits short for rough boring in wood.
Soft wood, Hard wood, Timber
Use the Spade drill bits short for rough boring in wood. Cutting spurs give cleaner cuts in heavily grained wood. Because of their simple construction they are relatively inexpensive and ideal for DIY use. Spade drill bits short are suited for drilling large holes, where other bit types get expensive. Spade drill bits short cannot be used to widen existing holes. It is possible to get a nice neat hole with a flat bit but the exit is usually messy. To prevent this use a backing block or drill from the other side once the central point breaks through.