When I'm on sites I see some crazy shit some time.. This guy bought a converted angle grinder, which can cut the concrete close to the wall if he withdraws protection cover.!! And I also think they have put on a bigger blade.. I don't think Makita has approved this at all..!! It is a rebuilding of this https://dk.makitamedia.com/images/3_Makita/301_machines/3011_a/30114_JPG_Product/4112HS.jpg