- HPMAISON JY-8828 68 mm hole saw set, designed for drilling concrete, masonry, and natural stone - Includes 110 mm SDS Plus adapter and 8 x 110 mm centering drill bit, ensuring precision and ease of use - Made of high-quality tool steel and YG8 tungsten carbide teeth, offering durability and long service life - Impact resistant, ideal for professional use in construction, renovations, and electrical installations - Ventilation holes improve dust and chip removal, keeping the work area clean - Compatible with 2 to 4 kg SDS Plus rotary hammers from all major brands - Allows you to make holes for sockets, ceiling roses, electrical boxes, and other installation work - Easy to assemble and disassemble, lightweight and practical design for greater efficiency - Suitable for hollow brick, red brick, cement, concrete, marble, artificial stone, and sandstone - Not recommended for abrasive materials such as sand-lime brick