1.1 These requirements cover walk-behind gasoline-engine-powered, ground-supported edgers and edger-trimmers that employ rigid cutting members, the diameter of which is not more than 12 in (305 mm).

1.2 These requirements also cover hand-supported, portable, gasoline-engine-powered edgers having at least one ground-support and employing a rigid cutting member that has a diameter of not more than 12 in (305 mm).

1.3 These requirements do not cover gasoline-powered edgers and edger-trimmers that employ a cutting means:

1. a) That has a maximum tip-speed of more than 12,000 surface ft/min (3660 surface m/min); or

2. b) That is made of nonmetallic flexible line.

1.4 These requirements do not cover accessories or attachments provided for the purpose of digging or cutting materials other than earth and grass.