Never had or seen a stripped Robertson, they are robust AF. Don’t ask me the physics. (They go deep into the screw head because of the simple shape, maybe that has part of it. And they are tapered, it’s not just a square, so they manage to grip the bit like a mofo.)
Never had or seen a stripped Robertson, they are robust AF. Don’t ask me the physics. (They go deep into the screw head because of the simple shape, maybe that has part of it. And they are tapered, it’s not just a square, so they manage to grip the bit like a mofo.)
I’ve snapped so many Robertson bits in my life. Screws are fine.
1 5/8" cement board screws
They used to be Robertson. They switched to Torx.
Night and day difference
Like you said, they do grip like a mofo, and with an impact driver, the bits snap.
I tried dozens of different brands of bits. Even paid top dollar for special Milwaukee ones.
I was at a point where I had to pre-drill and counter sink the screws because I was breaking too many bits.
I could probably drive a torx head one through a board