High-carbon steel plug taps are great for cleaning up damaged threads on lock sets and cylinders.  Also includes the corresponding drill bits to tap your own holes. 135° split-point drill bits give fast, precise drilling. 

Set includes one each of:

4 – 40 NC Tap and #43 Drill Bit
6 – 32 NC Tap and 7/64″ Drill Bit
8 – 32 NC Tap and #29 Drill Bit
10 – 24 NC Tap and #25 Drill Bit
10 – 32 NF Tap and #21 Drill Bit
1/4″ – 20 NC Tap and 13/64″ Drill Bit
plus a T-handle tap wrench.  High quality Taps are made in the USA.  Packaging is resealable to use as a storage case.