Never againI probably tried to use these on the wrong material... BUT: out of four attempts, three of them broke off almost instantly at the tip. One of them broke off at the top after one more turn of the screwdriver... Again, probably my fault. But. These feel like they're made out of tin? The ones that broke finally went in, after some determined screwing. Maybe they work in drywall or quarter inch lauan. Try before you commit.
by Jonzr