RASTKY Drill Bit Efficient for Concrete Wall Opening 4" Wet Dry Coring Bit for Air Conditioning Installation

Product Features

• [VERSATILE USAGE] This drilling bit can be used for both dry and wet drilling on various materials such as concrete, red brick, and marble.
• [UNIVERSAL THREAD] With a 5/8-11 universal thread, this drill bit is easy to assemble into standard fixed coring or handheld drill presses.
• [EXCELLENT MATERIAL] Made of high-hardness alloy steel with abrasive grains, ensuring a longer life.
• [EFFICIENT DESIGN] Features chip hole, regular saw teeth, and concentric axes for fast and efficient hole opening.
• [EASY OPERATION] Start drilling vertically and effortlessly drill deeper, saving time and effort in air conditioning installation and pipe drilling.