- SUQIN 100mm hole saw drill set with 110mm SDS Plus adapter, designed for drilling concrete, brick, and masonry - Made of high-quality carbon steel and YG8C carbide tip, ensuring durability and long service life - Includes replaceable pilot drill bits, SDS Plus adapter, fixing screw, and combination wrench for easy assembly - Chip removal holes facilitate dust extraction during drilling - Ideal for installing flush-mounted power outlets, air conditioners, exhaust pipes, and extractor hoods - Compatible with all impact drills with SDS Plus chuck - Each component is delivered in an individual plastic box and protected against rust - Recommended for professional and DIY use on concrete, drywall, brick, and sandstone - It is recommended not to drill through metal reinforcements and to use coolant to extend service life