The safety arm attachment kit holds the post in the driving ram channel during operation. All current Shaver Post Drivers use this post holder safety arm. Older drivers can be retro-fitted with this kit, although holes will need to be drilled in the driver channel to accept the mounting bolts.
Fits HD-8, HD-10, and HD-12 drivers
Complete kit with spring, mounting bracket and hardware
Can be retro-fitted on older drivers (may have to drill two holes in mounting channel)