The leaf spring and button type contacts from Keystone Electronics feature a unique "solder-ear" for wire lead attachment. The leaf spring contacts will maintain accurate spring tension and self-adjust to accommodate a variety of battery lengths. The leaf spring contact's unique spring design assures a reliable connection and a low contact resistance. Spring contacts are extremely rugged and ideal for retaining cells securely under severe shock and vibration in high-density applications. These economical and reliable spring coil contacts are fabricated of durable 0.010” (0.25 mm) nickel-plated spring steel which provides proper spring tension and low contact resistance while adjusting to variations in battery length. The need to specify exact brand, size, or shape is virtually eliminated.