yea i remember some door openings i had to cut with that ring saw through 10" of reinforced concrete, the saw bucking when it hit rebar and tossing me off some baker staging after it slammed me in the chest. What a great tool.

i always used out 14" demo saw to start the cuts, i found it awfully dificult to cut straight with the ring saw without at least scoring it first it tends to drift away.

i think its a partner 700 series? not sure though.

Good luck this summer hope everyone does well.