long arm

Short definition from Wiktionary

Noun

1. 1
   A pole tool used for handling things too far away to reach.
2. 2
   Influence; far-reaching power.
3. 3
   A gun with a long barrel, such as a rifle or shotgun.
4. 4
   A quilting machine that holds the fabric stationary on long rollers but allows the sewing mechanism to move around the surface of the fabric.