McCulloch Hook Blade - TitaniumDDP Elite USA McCulloch Hook Blade is a unique instrument made for use in conjunction with the McCulloch retractor frame. The unique hook shape of this blade allows it to grasp and retract a variety of soft tissue layers. This is particularly useful to allow further visualization and physical access to the site of interest in spinal surgeries. Additionally this hook comes in a black finish and is available six different blade lengths ranging from 2. 0