Size: HSS Co 8mm bit at 3-1/8 inch (79mm) overall length, HSS Co 6mm bit at 2-1/2 inch (65mm) overall length, easy to use. : Special grade steel cobalt blend is designed for long life to withstand high speed operation and high temperature applications. Accurate Position: The notched pilot tip increases accuracy and prevents slippage when held down for marking purposes. Application: Use spot weld drill bit to separate spot welds and resistance spot weld panels without distorting the sheet metal. High Quality: Made from HSS steel with cobalt, high strength and high hardness, easy to use. Material: Steel Color: Silver Package Content: 4 x Spot Weld Drill Bits /> Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.