FNKTEK leg extension and curl machine! What are the benefits of using FNKTEK's leg extension and curl machine? This leg extension and curl machine is designed to target different muscle groups in the legs and is ideal for strengthening the triceps, biceps, chest, shoulders and back muscles.You can use it to carry out a variety of different movements, you can sit on the bench or jump box to perform the workout, you can use it standing up or you can use the attachments to work other parts of the body to perform innovative movements.The weight plate holder on the leg extension and curl machine can be positioned in any way you want, either on the side or on the front, and the same weight plate placed in different positions will give different forces to the legs, so you can place it in the position you want, according to your needs. Save Space Leg extension and curl machines mounted on power cages go beyond traditional leg extension machines and save tons of space. Easy Installation After assembling the two leather rollers and the weight plate bracket into the whole accessory, use the included bolts to fix the accessory to the appropriate position of the power cage, and finally tighten the nuts to complete the installation. Adjustable Position You can see the square tube in the center has a lot of holes, three sides have 7-8 holes for other accessories, you can adjust its position as you like to meet your training needs. Product Specification Hole diameter: 18mm\26mm Number of holes: 7-8 Diameter of rollers: 100mm Weight capacity: 300 lbs Suitable for power cage: 50x50mm 60x60mm 75x75mm There are two hole diameters to choose from 18mm and 26mm, please pay attention to the size of your fitness frame before purchasing. The rollers on this leg extension and curl machine are thicker, with a diameter of 100mm, and the steel tubing inside has been thickened for more comfortable use. The weight plate bracket can be positioned differently so that you receive a different workout when placed in different positions. There are 7-8 holes on both sides and the front of the equipment to adjust the position and switch according to your needs. FNKTEK's leg extension and curl machine can be used in any gym or mounted on a home power cage!