Meet The Duke, aptly named after John Wayne, is a great basic work stirrup. The Duke’s excellent stability and smart style makes it the best value in economy stirrups on the market. Stained finish only. “The Leveler”, available only as an addition to Nettles Stirrups. An unleveled stirrup causes a foot to tilt, stressing the ankle. Like sand in your shoe, even the smallest tilt can cause discomfort.