Daredevil, 1" x 16", Spade Bit, Features Full Cone Threaded Tip For Fast & Effortless Drilling, Contoured Paddle For Fast Chip Removal, Hex Shank Power Groove To Reduce Slippage, Spur & Reamer Tips For Cleaner Holes, 1" Diameter, 15" Drilling Depth, 1/4" Hex Shank.