Features 1、Use fine twist drills for drilling, rotating smoothly and cutting sharply, and opening holes quickly and easily. 2、The scale is accurate and adjustable, the opening diameter range is 30mm‑200mm, and the applicability is strong. 3、Adjust the hole diameter by the distance from the cutter head to the center, suitable for drilling holes of various diameters. 4、After heat treatment, the cutter body has good performances of high concentricity and strong torsion resistance. 5、Made of high‑quality 45# steel material, high strength, good cutting performance, and it is not easy to deform after long‑term use. Specification Item Type: Hole Opener Product Material: 45# steel Opening Range: Approx. 30-200mm / 1.2-7.9in Hole Thickness: Approx. 3-50mm / 0.1-2in Application: Wood hole, gypsum board hole, three plywood hole, light box hole, spotlight hole Package List 1 x Hole Opener 1 x Hex Wrench 1 x Drill