Item Type: Hole Opener_x000D_Product Material: 45# steel_x000D_Opening Range: Approx. 30-200mm / 1.2-7.9in_x000D_Opening Thickness: Approx. 3-50mm / 0.1-2in_x000D_Drill Bit Diameter: Approx. 8mm / 0.3in_x000D_Drill Bit Length: Approx. 46mm / 1.8in_x000D_Application: Wood hole, gypsum board hole, three plywood hole, light box hole, spotlight hole 1The hole opener is adjustable, and the hole range is 30mm?200mm, which has strong practicability. 2With precise scale rod, the hole diameter can be adjusted by the distance from the cutter head to the center. 3After heat treatment, the cutter body has good performances of high concentricity and strong torsion resistance. 4The blade is made of high?quality 45# steel material, which has higher strength and better machinability. 5The hole drill bit is a fine twist drill, which rotates smoothly and cuts sharply, making the hole quick and easy.1 x Hole Opener 1 x Hex Wrench 1 x Drill Bit