The Ultra Precision Combination Arbor from GenSwiss is one of them. Why call up another tool when you can simply combine your slitting saw and drill into one toolholder? Makes perfect sense.
The tools come in shank sizes from .196″ to .500″ with tool bores of .125″ and .1875″. TIR is .0005″ to .0001″ depending on model. Visit www.genswiss.com for more info.