The absolutely best and the industry standard are the Brownell's Magna-Tip driver bits.
These are the hardest, best polished, and best quality there is.
They also offer far more sizes then anyone else.
If you ever break or damage a bit, just email Brownell's and they'll send you a new bit FREE.
You can try these by buying a S&W revolver-specific set that has a handle and 3 bits to fit S&W screws.
S&W SCREWDRIVER | Brownells
If you like them, buy as large a master set as you can afford.
I recommend buying a law enforcement size handle. It's the perfect size to give good control.
These come in magnetic or clip retention.
Most sets offer choices on the handle size.
I recommend buying both a magnetic and clip-tip handle, since you often need both.
MAGNA-TIP SUPER SETS? | Brownells
LAW ENFORCEMENT HANDLES | Brownells
The Brownell's set is far better then the Chinese made Wheeler sets, and offer way more bits then the Chapman.
As you need them buy additional Magna-Tip bits.
This is a high quality, professional tool set. You'll only need to buy one set a lifetime.