The best exercise for building thick crowned biceps is without a doubt the bicep curl. This Preacher Curl Bench eliminates cheating and elbow stress while providing perfect isolation to hammer your biceps. It features an adjustable seat and extra-wide stable design. Curl bar weight plates and collars are sold separately. Note: Product designed and warrantied for Home Use only.Extra-wide seat and arm pads 300 lb. weight capacityAdjustable seat and extra-wide stable designHeavy gauge steel construction