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This is the bit you want to use to install any of of our weldless kits.
Options:
- The
small bit goes from 1/8" to 7/8" in 1/16" increments. It has a 1/2"
stop which is ideal for the smaller weldless weldless sight kits (LP,
LK, TP, TK) and a 13/16 or 7/8" stop for putting in a 1/2" NPT weldless
bulkhead.
- NOTE: Despite the picture, The currently stocked large bit goes from 13/16" to 1-3/8" in 1/8"
(mostly) increments. Important - this bit cannot be use to start a hole but rather it is to be used to enlarge a hole that is already drilled to at least 13/16.
- For the best
value and max hole size versatility, you can get both bit sizes at a
combined discount. This gives you flexibity from 1/8" all the way to
1-3/8" in 1/16" increments.
Please note, these bits
are not the highest quality units you can buy (such as Greenlee, Klein,
or Irwin). However, those high end units also sell for over $40 each.
The bits I offer are a great value for someone looking to make less than
10 holes or so. If you keep them cool (let the work and bit cool down
after every two steps or keep dipping in oil or water for cooling) and
run them slowly, you'll get those 10 holes drilled before the bit is
toast. If you want a longer lasting bit, go for the $50 bits.
IMPORTANT!! If you spin the bit over and over without seeing a ribbon of
metal being cut, you're work hardening the metal you're trying to drill
and also dulling the bit. See more info on drilling in the instructions
area.
It is highly recommended that you start ANY size hole with
a smaller pilot bit approximately 1/8". Step bits are not very good at
starting a hole in virgin metal.
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Bien 
Harbor Freight