Fuller Pro Socket Extension 3/8 inch Silver SKU: 254185 MODEL: 507-3920 Error. try again later You've successfully joined the club $ 5 .98 each Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants Fuller Pro socket accessories are industrial grade for daily use. The range of CRV steel sockets with polished chrome finish are compatible with most brands of ratchets. Features and benefits Chrome vanadium steel. Polished for corrosion protection. Heat treated.