The 1-inch bits are standard Chinese stuff. The magnetic holder is substandard even for Chinese stuff. The spring-loaded retaining collar works OK, but the holder body is apparently PLAIN STEEL (not the usual non-magnetic stainless or bronze or aluminum that's been used for these tools for DECADES) so although the strong magnet inside grabs the bit it doesn't make the bit point magnetic at all. These won't even pick up a paper clip. If you're expecting a MAGNETIC holder as the description here says, you... more info
