Drill Bits Steel vs Titanium
From my experience....I've had some titanium drill bits for years (of occasional use). Regular steel drills seem to wear right out.
Why they'd include one of each in each size is a bit of a mystery to me. Maybe you can use the steel ones if you know you're going to be drilling through something that'll probably break the bit.
They only run cooler, and do not cut as well as a better quality of american made bit in 118 degree. This is an upgrade for selling bits, and you will find this in most tiawan or china made products. the better bits to use in most common steel cutting jobs are a cobalt drill bit. In drilling any type of job, it is better to use the correct size bit and don"t use a pilot drill. what happens when you use a pilot, the main bit will cut on the point dulling or sometimes chipping and will not cut. Once a chip occours on the point, the bit is worthless.
The things you can learn on this board!