Cold-forged Chrome Vanadium steel socket. Hardened, tempered and chrome plated. Fully polished mirror finish with knurled ring. Socket insert grips ceramic insulation and assists in extraction of plug. Especially useful on deep-seated plugs. For other variations of individual Spark Plug Sockets, see page XXX. * Hardened and tempered Chrome Vanadium steel socket. * Fully polished mirror finish with knurled ring. * Socket insert grips ceramic insulation and assists in extraction of plug. * Especially useful on deep-seated plugs. * Lifetime guarantee*. * Model No. S12SP10 https://elecena.pl/product/27190281/sealey-s12sp10-spark-plug-socket-1-2-quot-sq-drive-16mm-plug 2024-11-09 https://elecena.pl/product/27190281/sealey-s12sp10-spark-plug-socket-1-2-quot-sq-drive-16mm-plug 2026-07-03