The Tuff Stuff Gladiator Series ECD-44 Chin/Dip/VKR (Vertical Knee Raise) Trainer uses your body weight to train multiple major upper body and core muscle groups to give you a tapered, sleek and strong upper body, with solid functional strength to help you feel fit and aids you in helping perform better in many sports where core strength and upper body strength are important. Perform Wide Grip Pull Ups/Chin Ups to improve strength in Lats, Shoulders, Upper Back, Biceps and multiple secondary muscle groups. Perform Dips for added Tricep, Bicep and Chest work out and other secondary upper body muscle groups as well. Perform Vertical Knee Raise movements to help develop and tone Hip Flexors and Abdominal muscle groups. Constructed with 2" x 2" High Tensile Strength, Tubular Steel Frame with Comfortable Arm and Back Pads, Steel Handles with Rubber Hand Grips for solid, safer grip and includes Rubber Base Frame/Floor Protectors standard. Powder Coated Silver Frame With Black Pads for easy maintenance and clean up. Warranty 3 Years on Frame & 1 Year on all other parts.