Fangrui Product Details Solid & Durable Construction - The Calf Stretch Wedge Adjustable Is Made Of High-quality Eco-friendly Abs And Stainless Steel Material And The Triangular Structure Is Stable, It Can Bear Weight Up To 330lbs, Not Shaking, Not Deformed. This Ankle Stretching Board Is Ergonomically Designed, A Very Popular Alternative To The Heavy Wooden One.4 Angles Adjustment & Portable - This Inclined Board To Stretch Calf Has 4 Adjustable Angles: 20, 30, 40, And 45, You Can Adjust The Gear According To Different Needs. 4 Angles Adjustment On Slant Board For Calf Stretching Helps Make Your Muscles More Sensitive During Exercise, Helping You Stretch Properly And Reduce The Chance Of Injury.anti-slip Design - Non-slip Rubber Along The Bottom Of The Slant Board Guy Ensures The Stretcher Does Not Slide When Used On Any Surface. The Feet Stretch Board Has A Raised Heel Plate That Locks The Heel In Place While Nonslip Treads Prevent The Foot From Slipping While Using A Stair Slant Board.easy To Use And Carry - No Assembly Required. Adjust The Angle You Want And Gradually Stand On The Calf Stretch Board, Then You Can Do Exercises Like Stretching. This Calf Slant Foam Board Is Flexible For Use In The Office, Indoor-outdoor Exercise. This Exercise Slant Board Is Collapsible, Less Than 2, Easy To Carry.reduce Foot & Heel Pain - Reducing Foot Pain From Plantar Fasciitis, Achilles Tendonitis, Ankle Strain, Arch Pain, And Other Chronic Conditions, The Knee Over Toes Guy Slant Board Encourages Correct Foot Posture For Effective Stretching. This Stretch Board For Calves Also Contributes To The Recovery Of A Flat Foot, Pes Arcuatus, Eversion, Varus X-shaped Legs, O-legs.