Amtech F1740 14 Piece Hex Shank Wood Drill Set DURABLE: This 14 piece hex shank wood drill set includes 6 titanium coated flat wood bits and 8 carbon steel wood drills in assorted useful sizes between 3mm – 25mm. Useful for the Building of your Layout Board or your Display Diorama. All Amtech hand tools are backed by a three year product replacement warranty and power tools are covered for up to two years, subject to proof of purchase.