10ct or 24ct Solid brass, break resistant clip Tungsten carbide tipped ‘A’ Logo on the 10ct version Epoxy coating on 24ct version gives additional protection Our most popular pen kits, and the reason for this is that they are good quality, reliable and when completed, make wonderful presents. The 10ct Twist Pen requires only half a turn to advance the mechanism, at the same time locking the mechanism in place so that the refill will not retract during use. A heavy, solid brass break resistant clip, plated with 10ct gold plate makes the pen more attractive. Each pen kit includes a tungsten carbide tipped refill to provide smooth, trouble-free writing. The 24ct Twist Pen is gold plated and epoxy coated to give some additional protection to the plating. Requires 7mm drill. Use refill 310492.