HOIST FITNESS HD 3900 PEC FLY/REAR DELT COMMERCIAL GYMPec Fly Rear Delt HD 3900 The HOIST Pec Fly Rear Delt swiveling handles with pivoting hand grips, provide a variety of hand positions for both exercises. Easy to reach range of motion adjustments for both arms with 11 positions come standard. Each exercise arm has dual pivots, allowing users to define their own exercise path. And with seven seat pad adjustments, users of all heights can easily find a safe and comfortable position for both exercises.