16PCS Electric Hammer Drill Bits Wall Holes Opener Carbide Brick Wall Opening Hollow Drill Bits Air Conditioning Plumbing Hole Punch Tool Wall opener, also called hollow hammer drill, used for opening holes in masonry and concrete buildings, can punch on the brick and concrete walls. Equipped with 6 pieces of electric hammer drill bits, with different diameters to meet the different drilling needs. Compatible with most drill bits, with two types of handles, you can install an SDS-MAX shank or SDS-PLUS shank to fit most impact drill bits. Suitable for red brick walls, concrete walls, hollow bricks, foam bricks, etc.  Features: 【High Hardness】: Made of quality alloy material, is not easy to break, is wear-resistant, and with long durability. 【Utility Tool】: Wall opener, also called hollow hammer drill, used for opening holes in masonry and concrete buildings, can punch on the brick and concrete walls. 【6PCS Drill Bit】: Equipped with 6 pieces of electric hammer drill bits, with different diameters to meet the different drilling needs. 【High Compatibility】: Compatible with most drill bits, with two types of handles, you can install an SDS-MAX shank or SDS-PLUS shank to fit most impact drill bits. 【Wide Application】: Suitable for red brick walls, concrete walls, hollow bricks, foam bricks, etc. Not suitable for steel, tile, and stone. Specifications: Name: Holes Opener Set Material: alloy  Package size: 440 * 160 * 110mm / 17.32 * 6.30 * 4.33in Package weight: 5440g / lb Packing List: 6 * Hole Openers 4 * Drill Bits 2 * SDS-MAX Shanks 2 * SDS-PLUS Shanks 4 * Screws