This product should be used with a hand drill or wood trimmer (own motor). Easy to carry, easy to use, improves work efficiency. The effect is beautiful, suitable for storage in the vehicle toolbox. Is a professional locksmith's favorite tool. Quantity: 1 pc (only includes one, choose the appropriate size) Applicable: wood door open groove, wood door open hole. Product Description Specification: Material: High-speed steel Size: 16mm/16.5mm/18mm/20mm/22mm/24mm/25mm/26mm/28mm/30mm (Choose the size you need) Total height: approx. 40mm Blade width: approx. 16mm Thread size: approx. 10mm Applicable: wood door open groove, wood door open hole. Quantity: 1 pc (only includes one, choose the appropriate size) Features 1.This product must be used with a hand drill or wood trimmer (own motor). 2.Easy to carry, easy to use, improves work efficiency. 3.The effect is beautiful, suitable for storage in the vehicle toolbox. Is a professional locksmith's favorite tool. Note: 1.Please allow 1-3mm error due to manual measurement. please make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 pc x Carbide Wood Milling Cutter