IRWIN 1755ZR M16 X 1.5 OR 16MM X 1.50 RH CARBON STEEL PLUG CHAMFER HAND TAP 4 FLUTE. MOST HAND TOOLS ARE FULLY COVERED BY MANUFACTURER UNLESS OTHERWISE STATED. POWER TOOLS ARE ALSO COVERED BY MANUFACTURER'S WARRANTY AND ARE USUALLY HONORED AT A SERVICE CENTER IN YOUR AREA.