It's very easy to install. Once you remove the original knob, you need a drill or file set to make the hole a little bigger.
Jigging world Custom Install Van Staal Power Ball Knob - 39mm Gold/Black Knob
Jigging World - Power Knobs for Van Staal & ZeeBaas Spinning Reels
Jigging World - Power Knobs for Van Staal & ZeeBaas Spinning Reels
Van Staal Gold POWER Knob Fits VS and VSX-200, 250, 275 and 300.
Van Staal GOLD POWER Knob Fits VS and VSX-200 through 300
Jigging world Custom Install Van Staal Power Ball Knob - 39mm Gold/Black Knob : Sports & Outdoors
Van Staal Power Grip Handle Knobs
Jigging World Votex 39mm Eva Power Knobs Type A Black
Van Staal GOLD POWER Knob Fits VS and VSX-200 through 300
Jigging world Power Arm with 45mm Aluminum Knob fits
Jigging World - Avet Power Handle Arm and T-Bar for 2 Speed SX
Van Staal VR Series Power Knobs (125-200 Models) - The Saltwater Edge