Arrowmax am-419140 4.0 x 110mm Allen Wrench Limited Edition precision hex driver for RC maintenance  [am-419140]

Precision 4.0mm allen wrench for radio-controlled models

The Arrowmax am-419140 Allen Wrench is a compact, RC-scale hex driver specified as 4.0 x 110mm and released as a limited edition. It is intended for use with standard RC hex screws and fasteners, giving a defined tip size and reach for repeatable adjustments during setup and repair.

Use this tool when you need consistent torque feel for tasks such as tightening receiver mounts, adjusting servo linkages, checking motor and gearbox fasteners, or making on-track tuning changes. The 110mm length offers extended reach into recessed mounts while the 4.0mm tip matches common hex screw heads found across many radio-controlled models.

Practical tips: confirm screw head fit before applying full torque, work on a stable surface to avoid stripping, and keep the wrench clean from grit to preserve fit accuracy. Treat the piece as a hand tool for RC model work only and avoid using it on non-RC or larger mechanical systems.