Yankee Hill Machine YHM-9621 Forearm Wrench for YHM Rails

The Yankee Hill Machine YHM-9621 Forearm Wrench is a purpose-built gunsmith tool designed for the installation and removal of YHM freefloat forearms. YHM freefloat rail systems require two separate fasteners - a barrel nut and a jam nut - and this dedicated tool handles both jobs in a single wrench, eliminating the need to source multiple specialty tools for handguard service on the AR-15 platform.

The YHM-9621 is machined from 1018 carbon steel and finished in black oxide for corrosion resistance and long service life. It measures 8 inches in length and is configured with a barrel nut driver on one end and a spanner-wrench interface for the jam nut on the other. Made in the USA to YHM's factory specifications, the YHM-9621 is the manufacturer-recommended tool for properly seating and torquing YHM freefloat handguard systems.