( Makita Temporarily out of stock - alternative BER3430 will be supplied as a replacement, please see link below to view )
https://www.sparepartsworld.co.uk/product/BER3430
21mm x 52mm Impact Socket 1/2" SQ Drive with retaining pin and O Ring
Makita 134839-0 Impact Socket 21mm x 78 mm 1/2" Square