The Makita SDS-MAX, 18 in. Flat Chisel is manufactured using state-of-the-art technology, CNC machined and forged from industrial-grade alloy material for increased durability. Shot peened for added strength and increased surface hardness, the 751231-A is ideal for breaking concrete off of or away from main sections. The SDS-MAX, 18 in. Flat Chisel is clear-coat engineered to prevent corrosion for a longer bit life.