The press-fit aluminum collar forces the #2 Phillips bit to disengage once the screw is just below the drywall surface. One bit should do an entire room before it starts to wear. Nickel plated.
A special purchase enables us to offer these bits at a bargain price.
While not everyone would go through these as quickly as a drywaller, they are handy to have in the shop when a planned renovation project finally gets started. Bits are hardened to Rc62.