Deuce Wear Bars - 9" - 60? Uses the concave side design of Stud Boy's Shaper Bars with a new dual-runner design, One-piece design for light weight, Turns like a performance runner, Makes its own groove, so no darting on the trails, Eliminates dual-runner drag so no top-end loss, Self-cleaning design won't clog with snow, ice or rocks, Won't snag on obstacles, Extremely durable, Some models require drilling extra holes in skis.