1. Good helper: This complete hole saw kit enables easier hole cutting for home maintenance and repair. It is ideal for your projects and makes a thoughtful gift for fathers or friends with strong practical skills. Its high efficiency and durability support long-lasting use. 2. Quality material: The 9-piece hole saw concrete set is made from high-quality 45# carbon steel, 40 Cr, and YG8 alloy. It is robust and stable to provide long-lasting performance. In addition, the large chip removal hole and surrounding chip removal grooves effectively prevent chips from clogging, improving drilling efficiency. 3. Strong performance: The triangular cutting edge is sharp enough to quickly cut clean, smooth round holes up to 13.78 inches deep without adding water. It includes different sizes and shapes of extension rods and bits to meet various drilling requirements. 4. Portability: The toolbox has a handle and is lightweight at 11.46 lbs, so you can carry it easily and not miss any small accessories. Its central drill tip can be accurately positioned and is not easy to shift during operation, improving drilling efficiency. Applications: - Drill holes in concrete or masonry for electrical outlets, switches, or fixtures. - Create anchors or dowels in concrete floors or walls for shelves, furniture, or equipment. - Mount heavy hardware or run conduit and pipes in masonry surfaces during renovations.