The electroformed nickel records are mechanically separated from their respective mandrels. Some of the tools used include pliers, pin vises, file, wire cutters, and mandrels. There are several types of mandrels used with lathes. Gas lifted wells are equipped with side pocket mandrels and gas lift injection valves. Original expanding mandrels have a slightly tapered wedge that will expand to hold the item. Non-conductive (glass, silicon, plastic) mandrels require the deposition of a conductive layer prior to electrodeposition. Coil is further converted in processing centers that require hydraulic unions for actuation of mandrels. The "mothers" are then used as mandrels for electroforming more negative discs known as "sons". Following filling the mandrels are retracted and a secondary top mould seals the container. Bending can be done with or without mandrels. It is also less commonly used for non-sparking tools and mandrels for metal spinning. Although punching is possible, it requires support mandrels and awkward handling. In most cases, these mandrels are supplied with air pressure from different sources. There are two common types of mandrels. He also names the vicious creatures as Mandrels.