Extraordinarily durable workout machine for killer triceps, deltoid, lower pecs, and abs. The Body-Solid Deluxe Vertical Knee Raise workout machine will provide you will an extraordinary ab workout. This is while the machine is able to eliminate the strain that may be placed upon your lower back during the process. The machine is great for those hoping to target an overall slimmer waistline. Within the machine are two different kinds of machines each designed to specifically target specific problem areas. The overall construction of the machine has been made to be as comfortable for users as possible. This is due to the included open entryway design, thick back/arm pads, and oversized handgrips. The machine is also constructed with a heavy-gauge frame that is made of four welded sides.