ALFA TOOLS HTLM81138 M16.0 X 1.50 OR 16MM X 1.5 LH. ALFA TOOLS. HIGH SPEED STEEL HAND TAP PLUG CHAMFER 4 FLUTE. LEFT HAND TAP. IT IS NOT INTENDED FOR CUTTING OR STARTING NEW THREADS. MOST HAND TOOLS ARE FULLY COVERED BY MANUFACTURER UNLESS OTHERWISE STATED.