The reins were secured by chain-work, and the front-stall of the bridle was a steel plate, with apertures for the eyes and nostrils, having in the midst a short, sharp pike, projecting from the forehead of the horse like the horn of the fabulous unicorn.    From Wordnik.com.  [The Talisman] Reference

Then there was a steel axe, or hammer, called a mace-of-arms, and which hung to the saddle-bow; the reins were secured by chain-work, and the front-stall of the bridle was.    From Wordnik.com.  [The Talisman] Reference