Features Adjustable Drill Guide: The 3-in-1 hole punch is an adjustable drill guide, which can easily meet your drilling requirements, which is very convenient. Equipped with 6/8/10mm Drill Sleeve and Twist Drill: The hole punch is equipped with 6/8/10mm drill sleeve and twist drill, which can accurately drill holes of the corresponding size. Equipped with A Special Splint: The hole punch kit is equipped with a special splint, and there is no need to use locking pliers to clamp the wooden board when punching side holes, which is simple and easy to operate. Sturdy And Stable: The hole punch drill sleeve is forged from selected tool steel, featuring good strength, sturdy and stable, durable to use. Fine Workmanship: The self centering dowel jig kit has excellent workmanship and use of selected materials, it has strong and durable features, high precision and long service life. Specification: Drill Guide Material: 6061 Aluminum Alloy Drill Bushing Material: Nitride Tool Steel Drill Thickness: 10-180mm Side Hole Diameter: 15mm Direct Hole Diameter: 6/8/10mm Slide Stroke: 5-90mm Side Hole Stroke: 23-43mm Size: Shown as picture Weight: Approx. 1550g/54.7oz   Package list: 1 * Extension Locator 9 * Drill Bushings (3pcs 6mm, 3pcs 8mm, 3pcs 10mm) 2 * Knurled Bolts 4 * Limit Ring (1pc 6mm, 1pc 8mm, 2pcs 10mm) 2 * Star Screws 1 * 15mm Tapper 3 * Drill Bits 6/8/10mm 1 * Hook Spanner 1 * Clamp Board 1 * Slider Set 1 * Main Board 2 * Washers 0.5/1mm 1 * Hex Wrench 1 * User Manual   Note: Since the slider slides 2mm each time, it can only be aligned with the center of the plate of 10, 14, 18, 22mm, etc. If the thickness of your plate is not these thicknesses, it can't be aligned with the center to punch hole without adding washer. Package List