The Hammer Lock handle is an easy-grip, 3-inch handle compatible with Scotty and Folbe rod holders and accessories. Using it allows you to fine-tune your rod&';s angle. It&';s designed to provide enough torque to lock Scotty sliding discs. The large grip size is helpful for those with hand grip issues or nerve problems. The Hammer Lock is constructed from marine-grade 316 stainless steel, anodized aluminum, and durable plastic, and comes in a variety of colors. The Hammer Lock works whether the user is using their rod holder stock or any other angle adjustment device.