A miter saw assembly comprising: a circular saw comprising: a circular blade, a motor operable to rotate the circular blade, a power supply operable to provide power to the motor, and an attachment mechanism; and a miter base comprising: a base, and a support arm comprising: a coupling arm detachably coupled with the attachment mechanism of the circular saw, a vertical pivot operable to pivot the coupling arm in a vertical plane, and a horizontal pivot rotatably coupled with the base, the horizontal pivot operable to rotate the coupling arm in a horizontal plane, characterized in that: the attachment mechanism comprises a slot formed in a housing of the circular saw between at least one slot indent, a slot side wall, a slot bottom wall, and a slot top wall, the coupling arm comprises a slide, and the slide is received within the slot to detachably couple the coupling arm with the attachment mechanism. a circular saw comprising: a circular blade, a motor operable to rotate the circular blade, a power supply operable to provide power to the motor, and an attachment mechanism; and a circular blade, a motor operable to rotate the circular blade, a power supply operable to provide power to the motor, and an attachment mechanism; and a miter base comprising: a base, and a support arm comprising: a coupling arm detachably coupled with the attachment mechanism of the circular saw, a vertical pivot operable to pivot the coupling arm in a vertical plane, and a horizontal pivot rotatably coupled with the base, the horizontal pivot operable to rotate the coupling arm in a horizontal plane, characterized in that: the attachment mechanism comprises a slot formed in a housing of the circular saw between at least one slot indent, a slot side wall, a slot bottom wall, and a slot top wall, the coupling arm comprises a slide, and the slide is received within the slot to detachably couple the coupling arm with the attachment mechanism. a base, and a support arm comprising: a coupling arm detachably coupled with the attachment mechanism of the circular saw, a vertical pivot operable to pivot the coupling arm in a vertical plane, and a horizontal pivot rotatably coupled with the base, the horizontal pivot operable to rotate the coupling arm in a horizontal plane, a coupling arm detachably coupled with the attachment mechanism of the circular saw, a vertical pivot operable to pivot the coupling arm in a vertical plane, and a horizontal pivot rotatably coupled with the base, the horizontal pivot operable to rotate the coupling arm in a horizontal plane, characterized in that: the attachment mechanism comprises a slot formed in a housing of the circular saw between at least one slot indent, a slot side wall, a slot bottom wall, and a slot top wall, the coupling arm comprises a slide, and the slide is received within the slot to detachably couple the coupling arm with the attachment mechanism. the attachment mechanism comprises a slot formed in a housing of the circular saw between at least one slot indent, a slot side wall, a slot bottom wall, and a slot top wall, the coupling arm comprises a slide, and the slide is received within the slot to detachably couple the coupling arm with the attachment mechanism.