All of the performance, none of the reflections. The Green Pin Standard Bow Shackle with Screw Collar has been specially developed for use in theatres and other entertainment venues. Due to its black matte finish, the Theatre Shackle shows no sheen or light reflections and therefore does not distract from the performance on stage. The screw pin enables quick (dis)assembly which makes the shackle perfect for rigging activities in which assembly and disassembly occur relatively frequently.