Features: Achieve precise and efficient woodworking with our Aluminum Woodworking drill guide. This all metal drill locator is practical and ensures accurate drilling every time. Suitable for woodworking enthusiasts and professionals, this self centering drill guide tool is suitable for anyone looking to create holes in wood. Clamps on Thickness of 10-25mm Wood Board; Chuck Holding Diameter of 1.5mm-13mmShank; Fixed clips can be installed, with hinges holes of 26/35mm for clamping wood board, and edge distance of the holes can be set to 3/4/5/6mm; Specifications: Material:Aluminum Size:Approx.23.5x9.8cm/9.25x3.86inch Spring Compressions Height:Up to 48mm; Chuck Holding Diameter of 1.5mm-13mmShank; Clamps on Thickness of 10-25mm Wood Board; Package Includes: 1pcs Drillling Guide note: Please allow 1-2cm errors due to manual measurement,please make sure that you donot mind befores you order. Due to the differences between different monitors, the picture may not reflect the actual item color.