Premium Quality: Made from tungsten steel and heat treated. Ensuring its high hardness, sharp edge, high precision, smooth cutting, impact resistance, high toughness; 5PCS: include 40/45/50/60/70mm, can be used for punching wooden products, mounted spherical door push tip, drawer, plastic products, wood, plywood, etc. Warm Tips: We are all over 40mm large size drills , it is better to use machines with good fastening performance for drilling operations, such as drills, bench drills, vertical drills and stand motor drill. if you need to work with a hand-held electric drill, it is better to use it with a vise with good clamping effect. Easy to Store: each drill is packed separately in a plastic bag containing oil to prevent rust. And each drill has a plastic storage box to prevent the drill bits from getting dull. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!