Airachnid's Drilling Technique?

So far, we have already seen Airachnid's drilling techniques numerous times before. Did Airachnid use her robot legs to drill, or did she use her spider limbs/rotors to do it? And as for the drilling technique, is Airachnid the only Transformer who can do that, or is there some other Transformers who previously used this technique before Airachnid herself did? 
