605627 - 

Square, Rectangular and Radius Hole Cutters
Square, rectangular and radius (rounded corner) hole cutters suitable for use on mild steel (28 tons/in² uts max) up to 1.6mm (16 swg) and aluminum up to 2mm (14 swg) except as marked * (in which case capacity is 18 swg/1.22mm mild steel)
Approvals:
cULus, TUV, PSE