Features: This aluminum alloys vertical drilling guide kit ensures perfectly perpendicular holes, eliminating drill bit wobble and enhancing woodworking precisions for professional grade result. Features adjustable positioning components and universal drill bit compatibility, allowing precise depth control and seamlessly adaptation to various wood thicknesses in DIY projects. Ideal for both professional woodworkers requiring workshop level accuracy and DIY enthusiasts tackling home improvement tasks with confidence. Essential for furniture assembly, cabinet installations, and craft woodworking where exact 90 degree drilling is critical for structural integrity. The corrosion resistant aluminum construction combines lightweight durability with enhances stability, transforming standard power drill into precisions woodworking instrument through its guide system. Specifications: Component: Aluminum alloys Color: As pictures shown. Size: 48x48x40mm/1.89x1.89x1.57in Quantity: 1 set Package Includes: 1pc Hole Puncher and 9pcs Drill Sleeves note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.