OTO (Out-To-Out) refers to the outside-to-outside dimension of the fingerpieces on a paddle. This is a fixed measurement that determines the spacing between your fingers when operating.
Available OTO by Model
ZN-9+ and ZN-QRP
Available in 1/2" or 3/4"
ZN-MiniMITE, ZN-9RZ, ZN-9ZX
Available in 3/8" or 5/8"
ZN-Lite and ZN-45
Available in 5/16" or 9/16"
ZN-SL Single Lever
3/8" standard (special order single fingerpiece available at 1/8" thickness)
Choosing Your OTO
OTO choice is a personal preference and has nothing to do with your code speed or sending abilities. It's simply about what feels comfortable in your hand.
Some operators prefer a narrower spacing for quick, precise movements, while others find a wider spacing more comfortable for extended operating sessions. If you're unsure, contact Tony to discuss your preferences and hand size.
💡 Tip: If you've used other paddles before, measure their OTO and use that as a starting point. Otherwise, the middle options for each model are a safe choice for most operators.