This multi-tool could be useful for both big and small projects. There's no cord to restrict you, just make sure you've charged the battery.
From ManoMano
DCS355P1 18V xr Multi Tool, Accessories & TStak Case (1 x 5.0Ah Battery) - Dewalt
Powertool World
DeWalt DCS355P1 18v XR Brushless Oscillating Multi-Tool 1x 5.0Ah Batt
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