Contains Sizes: 14, 15, 16, 16.5, 18, 20, 22 & 25mm Reduced Shank for sizes above 10mm and 3/8 to suit 10mm or 12.5mm drill chucks Black oxide coating maximises lubricant hold, therefore assisting chip flow and heat dissipation 3 flats on shank, prevents slippage in chuck 118° Split Point ideal for drilling into pilot holes