Non-slip worm drive. Precision manufactured from the finest British steels to BS 5315. Passivated zinc finish to give double protection. For automotive, gas, plumbing and agricultural applications. Features and Benefits • Slotted hex head 7mm A/F • Non-slip worm drive • Mild steel • Passivated zinc plated Typical Applications • Ideal for automotive, gas, plumbing and agricultural applications Standards Met • DIN 3017