A pen vice includes a base, an operating device mounted onto the base and multiple studs vertically secured on the base, wherein the studs correspond to two opposite sides of the base. Two parallel link mechanisms respectively mounted onto the studs that correspond to the two opposite sides of the base. A first sliding jaw and a second sliding jaw is disposed between the two parallel link mechanisms. The two parallel link mechanisms drive the first sliding jaw and the second sliding jaw to clamp or release a pen shank.

A checking device is disclosed. In some implementations, the checking device may include a clamp including a base and a linkage structure connected to the base, a first support member fastened to the base, the first support member having a through-hole corresponding to a fastening hole of an object, and a second support member connected to the linkage structure, the second support member moving relative to the first support member, based on movement of the linkage structure. The second support member may oppose the first support member with the object interposed therebetween. The through-hole may accommodate a checking pin passing through the through-hole and the fastening hole.

An alignment tool includes a mounting flange, a support leg fixedly coupled to the mounting flange and cooperating with the mounting flange to define a partial annular ring that extends in an arc between 190 degrees and 350 degrees, and a second quantity of jack bolt pairs movably coupled to the support leg, each jack bolt pair arranged to engage one of the first quantity of seal segments. A third quantity of mounting fasteners is positioned to fixedly attach the mounting flange to the inner casing.