Feature: 1. Package Included: Sizes 30mm(1‑3/16in), 40mm(1‑9/16in), 50mm(2in), 65mm(2‑9/16in), 1 SDS PLUS Shank (220mm 8‑7/10in), 1 center drill bit (110mm 4‑5/16in), 2 screws, 1 hex wrench. 2. Long Lasting: Made of tungsten steel, this concrete hole saw kit is of high hardness, rustproof, long lasting. And the hole saw has vent holes for easy dust removal and effectively improves work efficiency. 3. Versatile Use: This concrete hole saw kit is suitable for a variety of materials such as hollow bricks, cement walls, concrete walls, red bricks, etc. It can be used for the opening of range hoods, water pipes, water heaters, flues, sewers, and more. 4. Instructions for Use: Equipped with hole saw drill bit, suitable for SDS Plus tools made by various manufacturers. Add a coolant during continuous high speed drilling to prevent drill bit burnout or breakage, which increases the product's life. 5. Great Solution: 30 40 50 65 220mm concrete hole saw kit provides a complete solution for construction workers, DIY enthusiasts, and professional maintenance personnel. Specification: Item Type: Concrete Hole Saw Kit Material: Tungsten Steel Weight: Approx. 1710.00g / 60.32oz. Package List: 1 Set x Concrete Hole Saw (9 Pieces) 5 x Storage Box