Features 1、The hole opener is adjustable, and the hole range is 30mm‑200mm, which has strong practicability. 2、With precise scale rod, the hole diameter can be adjusted by the distance from the cutter head to the center. 3、After heat treatment, the cutter body has good performances of high concentricity and strong torsion resistance. 4、The blade is made of high‑quality 45# steel material, which has higher strength and better machinability. 5、The hole drill bit is a fine twist drill, which rotates smoothly and cuts sharply, making the hole quick and easy. Specification Item Type: Hole Opener Product Material: 45# steel Opening Range: Approx. 30-200mm / 1.2-7.9in Opening Thickness: Approx. 3-50mm / 0.1-2in Drill Bit Diameter: Approx. 8mm / 0.3in Drill Bit Length: Approx. 46mm / 1.8in 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 Bit