- Zig zag circumferential grooves holds snow in the tread for ideal snow-on-snow traction - Saw-tooth features of Hercules Snow-Grabber Grooves holds snow in the tread to provide critical traction - Thin gauge, full-depth siping creates more biting edges to help grab snow and ice - Optional stud pins provide enhanced snow and ice traction - Meets the required performance criteria for Use in Severe Snow Conditions