Thin arms tend to deform and compromise hook-setting, while thick arms fail to transmit blade vibration to the body—this dilemma is solved by the BT Spinnerbait Swagy. The specially processed BT arm delivers outstanding balance: the 0.95 mm diameter lower arm provides high rigidity and resists deformation, while the 0.6 mm diameter upper arm efficiently transfers blade vibration throughout the body, creating a supple, lifelike skirt action. The head combines tin and tungsten, with the high-density tungsten concentrated on the bottom. This stabilizes swimming even at high retrieve speeds such as gurgling and buzzing, and around cover it ensures quick recovery after deflecting off obstacles, reducing snags.