Material: High Speed Steel, 4241Product Configuration: 1 Miter Hole, 1 Positioning Ring and 1 Small Wrench. Product feature: with the diagonal positioning device, the punch can be tilted wooden plate. The correct method of operation is as followsOne: adjust the height of the drill bit,Two: clip the boards you want to play,Third, insert the drill bit into the hole and hit the wooden board. Four: then the drill bit is lifted to 5mm (remember not to run the drill bit with wood). V: start the electric drill to reach the speed of 500 rpm, the recommendation is 1500 rpmSixth: start to feed slowly, such as the front thin bit half or whole, then the feed can be acceleratedPayments1. We accept Alipay, West Union, TT. All major credit cards are accepted through a secure payment processor escrow.2. Payment must be made within 3 days of placing the order.3. If you are unable to check out immediately after the listing ends, please wait a few minutes and try again, payments must be completed within 3 days. Shipping1.