that is about the only thing these bits are good for...soft surfaces - possibly aluminum but for things harder, I would consider different bits better suited for harder surfaces.
Although these bits were rated poor for my use - standard steel, they shoudl have no issue with Brass but would recommend using light force when pushing the drill
Yes, but these bits are NOT "screw size" pilots. They are a set of small 1/32 step bits in cheap pot metal shanks that come off.
Hi Rodogg, These bit will work in any of the hex shaped drivers and the 3 jaw chuck drills. Hope this helps, Greg
Most 1/4" hex shank bits should fit your unit.
Not sure what the manufacturer would say, I tried to drill through non hardened steel and snapped 2 bits. Would recommend you look for bits more suited for hardedened steel and use drilling oil to ensure you don't have overheating