seems like i cant seem to get the set screws to hold the flipper shaft tight .
i am using a Hollow Round Shank Nut Driver with torx bit but it hard to reach the bolts with having to screw them in sideways.
i am using the set screw that came with a the new flipper mechanisms which have cone ends instead of points.
is there a there a different kind of screw that would work better?
and what kind of tool and size would work best?

this is for a flash pinball machine .
the flipper shafts did have small nicks in it from where the set screw were.
the set screw are Allen wrench's but i don't have the right size.
using the set screw included with this flipper rebuild kit.

fpkt-0051 (resized).jpg

thanks for the advise , i do need to get the proper bit for my ratchet which is a 1/8 hex for a 3/8 drive socket.

thanks i will able to tighten flippers enough to where they work great.