BEFORE MAKING MY PURCHASE I CHECKED IF IT WAS COMPATIBLE WITH BioLogic Arx Grips with T-Tool, BUT WHEN I RECEIVED IT IT IS A LITTLE LARGER FOR THE SUPPORT, SO I HAD TO FIGURE OUT REPLACING THE PLASTIC SUPPORTS WITH A CORK IN EACH ONE, WHICH WAS GOOD, AS A RECOMMENDATION THEY COULD PLACE THOSE PLASTIC SUPPORTS OF VARIOUS SIZES TO FIT SEVERAL ENTRANCES.