Mile Marker SEC18 18000 LB. Winch With Steel Cable Model 77-50280WMile Marker SEC18 18000 LB. Winch With Steel Cable Model 77 50280W Mile Markers most powerful winch to date: SEC18. With 18,000 lbs. of pulling and recovery power, this electric winch can be utilized in many applications, from tow trucks to industrial DC; due to its relatively lightweight and wide range of flow accommodations. The SEC18 features fast line speeds and is completely sealed. Features: 7. 7 HP Series Wound Motor Rugged Planetary Gear Sets