I have been looking for a suitable metal for some custom tools I want to have built for me. I am no engineer or metallurgist but I have someknowledge of metals. I have been looking for something relatively light weight, with as high a hardness as possible while retaining toughness. I was in the local lowes yesterday and came across the Bosch masonry/concrete drill bits, these things are VERY light, super hard and durable enough to be used in an air hammer. I was so impressed with them! I have not been able to get a Bosch rep to give any details (hopefully not because it is a secret or something). I want to know what specific alloy they use in these bits so I can order it and use it in my new tool. So, long story short does anyone here know what that would be or who I should talk to? I appreciate any help you can give, thank you in advance. My direct email is olaf email@example.com please feel free to send any reply's there. Thanks again!