Circular saws have one blade mounted right on the axle of the engine. The saw has a voltage of 18 volts and weighs in at 3.4 kg, so it should work for everyday use.
From ManoMano
Metabo KS 18 LTX 57 Circular Saw 165mm 18V Bare Unit MPTKS18LTX
Elmers Hardware
Metabo KS 18 LTX 57 18v Circular Saw Body Only 601857890
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