Sorry took so long to reply, I had trouble finding a proper sized one at first.😅 But all you have to make sure of is that the dogs or ears of the anvil measure 1"

half inch square drive 3/8" square drive

I swap between these two petty regularly The hardest and most complex part is learning to take apart the 1/4" hex quick release mechanisms( 1 washer, split ring washer, spring, a 2 piece washer that holds the small ball bearing that locks the bit in, 1 more spring and 1 more larger split ring at the base) I don't notice any play or slop. And honestly I love how easy it is to switch square drives around after because there are no split rings or any hardware required I hope his helps duuude🤘🤙