The 2 largest sizes have a Hexagon Bolster at the top of the shaft to enable use of a spanner for extra leverage. BRITOOL HALLMARK 5pce EXTRA LONG FLEXI RATCHET RING SPANNER WRENCH 8-19mm. Britool Hallmark 32 Pce 1/4 Drive Socket Ratchet Extension Set 4mm - 14mm TMO.
