Rotary Corp
Rotary Corp brand aftermarket product. Spark plug socket size: 3/4" (19mm). Guide bar nut size: 1/2" (13mm). Echo 601, 100; Husqvarna 60 series, 160 series, 77, 180, 185, 263, 280, 380, 1100, 2100; John Deere 8, 9, 12, 15; Montgom- ery Ward 2400A,...