This Starrett STRHS102AXFCH0400 missed the mark by miles. It's advertised as Fast Cut Bi-Metal Hole-saw. It cut to a depth of between 1 - 11/2 mm with cutting fluid at slow speed using a 110 volt drill and failed miserably. In the past I have used several different sized Starrett cutters ranging from 16 - 125 mm to cut through mild steel plate thicknesses between 3 - 5 mm and all have performed admirably several times. I would Not recommend this product.
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