Functions: The positioning extension cable is extended to 600 mm, which greatly increases the positioning distance between the two holes. The extension rod is detachable, and the positioning of the long hole is more convenient. Wide range of process thickness from 10-180mm. The sliding stroke length of the block is 5-90mm, sufficient for many applications. Made of thin aluminum alloy, durable and has a long service life. Specification: Tool Material: Aluminum Alloy Drill sleeve material: nitride tool steel Process Thickness: 10-180mm/0,39-7,09inch Side hole diameter: 15 mm Front hole diameter: 6/8/10 m Sliding block stroking distance: 5-90mm/0,2-3,54inch Side hole stroke distance: 23-43mm/0,91-1,69inch Size: as shown in the picture List of packages: 1 x Extended Locator 9 x Drill Sleeves (3-Pack) 6mm, 3 pcs. 8mm, 3 pcs. 10 mm) 2 x Knurled Screws 4 x Restriction Ring (1 pc. 6 mm, 1 pc. 8 mm, 2 pcs. 10 mm) 1 x 15mm Tapper 3 x drill bits (6 mm / 8 mm / 10 mm) 1 x Hook Wrench 1 x Set of Sliders 1 x Motherboard (including 3 pcs.8mm drill sleeves) 2 x gasket (0,5 mm / 1 mm) 2 x Hex Socket Wrench 1 x User Manual 2 x Threaded Rod 1 x Terminal Plate Since the slider moves 2 mm each time, it can only be aligned with the center of the plate 10, 14, 18, 22 mm, etc. If the thickness of your plate is not such a thickness, it can not pierce the center, if completely without a gasket.