Wood spade drill bit – Pro series Diameter: Ø32.0mm Working length: 150mm Shank: 6.35mm hex for quick change Application: A spade drill bit is used for rough boring in wood. The Pro Series range spade drill bits are equipped with spurs to achieve a faster and cleaner cut compared to standard spade drill bits. Spade drill bits can be used to drill in: Hard wood Soft wood Chipboard MDF Plywood Manufactured from High carbon steel. Spade bits are also known as paddle bits or butterfly bits. TIP: To avoid splintering, drill the workpiece from both ends.