PRICES MAY VARY. 【HIGH PERFORMANCE METIERAL】Bi-metal 6" hole saw is made up of M42 High Speed Steel teeth and carbon steel band, with higher hardness(≥64HRC), higher toughness and stronger wear resistance ,for longer life 【EFFICIENT SMOOTH CUTTING】The best cutting performance of HSS teeth combines with variable tooth pitch and non-binding clean edge design ensure hole saw blade cuts smooth, clean and fast. 【WIDE APPLICATION】Hole saw cuts 6" diameter holes through wood, drywall, plaster and acryl