Features Made of high quality aluminum alloy material, durable and long service life. The positioning extension rod is extended to 600mm, which greatly extends the positioning distance between the two holes. The extension rod is detachable, and the positioning of the long hole is more convenient. A wide range of processing thicknesses from 10 to 180mm. The slider stroke is 5~90mm, which can meet various needs. Features: -Made of high quality aluminum alloy material, durable and long service life. -The positioning extension rod is extended to 600mm, which greatly extends the positioning distance between the two holes. -The extension rod is detachable, and the positioning of the long hole is more convenient. -A wide range of processing thicknesses from 10 to 180mm. -The slider stroke is 5~90mm, which can meet various needs. Specification: Tool Material:Aluminum Alloy Drill Bushings Material:Nitride Tool Steel Process Thickness:10~180mm/0.39~7.09in Side Hole Diameter: 15mm Frontal Hole Diameter:6/8/10m Sliding Block Stroking Distance:5~90mm/0.2~3.54in Side Hole Stroke Distance:23~4m/0.91~1.69in Size:As shown in the picture Note: 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 not punch the center if completely without the gasket.  Package List