Proxxon industrial 27 piece automotive socket set proxxon 23020 this high quality 27 piece socket set from proxxon industrial includes all the tools needed to deal with the majority of screws and bolts found in modern vehicles suitable for all common sizes between 6mm and 32mm also contains 16 and 21mm spark plug sockets proxxon industrial 23020 automotive socket set 1 4 1 2 ratchets 27 piece