best to get a drill-driver that uses lithium-ion cells;they keep a charge
in storage for several months.An impact driver would seem to suit your
purposes best. get one that has a fast charger,1 hour or less.
I suppose he could buy an old worn-out bit,cut down and grind the shaft to
a 1/4" square to fit a 1/4" socket,but he still will not have the little
spring-loaded ball bearing that retains the socket.
Or he could weld/braze a standard hex-1/4" drive adapter to the shaft of
Rent an impact driver to see if it suits your application. If it does,
buy one of your own. Makita is very good, others may be equal to the
job. Look for a fairly high impact rating like 1000 inch-lbs or more.
Then be sure your lag bolts are decently graded. There is a lot of
grade 2 or less stuff out there. The right grade and size lag should
drive without any need to a lubricant. Deck builders do this
Just cut the female end off a 3/8" extender, or grind off the sides and leave a
nub on opposite side to get a better grip in the brace.
They do make a tool which is the same as where you are aiming. A brace with a
socket end, essentially.
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