Features: 9PCS drill set including a 8mm twist drill, a 3/8 spot-welding drill, 2pcs center drills, and 5pcs hole saws. The spot welding drill set is helpful for quickly separate spot welding panel, repairing and removing welding spot, drill hole, etc. Adopts anti-skid hexagonal handle design to facilitate installation and improve efficiency. Made of high speed steel material with solid workmanship, durable and not easy to break. Bits are compatible with pneumatic tools and electric tools, suitable to work on stainless steel plates, aluminum plates, and iron plates, accurate positioning and high efficiency. With a transparent plastic case to store all of the drill bits. Specifications: Quantity: 9pcs / 13pcs (Optional) Material: HSS Shank: Hexagonal shank Package Weight: 88g / 3.10oz, 90g / 3.17oz Package Size: 10 * 4.5 * 2.3cm / 3.94 * 1.77 * 0.91in Packing List: 9PCS: 1 * Twist Drill 1 * Spot Weld Drill 2 * Center Drill 5 * Hole Saw