By immobilizing the upper arm, the XMark preacher curl bench maximizes the size and overall shape of your biceps. The preacher curl exercise forces the bicep to work in isolation. This means you’re pushing all the muscle fibers in the bicep nothing else the XMark Preacher Curl Bench is designed with an extra-thick cushion and preacher curl pad so comfort won’t be an issue. Ergonomically spaced rubber-lined bar catches can spot you if you pick up without scratching the bar or bench. For comfort and convenience, this bench sports eight vertical preacher pad height adjustments. Sculpt and define your ideal biceps with XMark.