The Bosch 5.5mm x 160mm SDS Plus-3 Hammer Drill Bit is a durable high-alloy drilling solution for working with concrete. The bit is produced with optimised hardening technology which strengthens it and reduces wear damage. The 4-flute dura design improves endurance by providing effective dust removal, which also works to prevent excessive heat development. The cutting edges are indented and made from a Bosch-controlled carbide blend to provide additional resistance. As a mark of is quality the bit is marked with the test mark of the PGM Masonry Drill Bit Association Board, guaranteeing users exact drilling and firm hold of fixings. This bit is designed for rotary hammers with SDS plus holders, and is ideal for concrete and masonry.