Due North Industrial Ice + Snow All Purpose Industrial-Grade Traction Aids Textured Diamond Knurling inner lining grips the footwear, keeping traction aids stable and in place. 8 (16/pair) replaceable, military-grade tungsten carbide Due North Ice Diamond spikes provide comfort under the foot and improved traction. Spike patterns strategically placed at the heel and front of the sole, leaving the mid-sole area open for safe ladder use, no need to remove when climbing or descending ladders (mid-sole models excluded). Geometrically designed strap webbing and improved shape fit a greater variety of footwear. Molded-in retention strap attachment points, for use with optional retention strap (sold separately) Pack of 1