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 . <EOS>