- 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