Makita Drill Bits & Parts Hammer drill bit 632901 - Makita D-33881, The Makita D-33881 hammer drill bit features a 12 mm diameter and a total length of 540 mm, designed for SDS-Max systems. This robust masonry drill bit is ideal for tackling tough materials like stone and brickwork. It excels in various applications, making it suitable for stone, masonry, and brick drilling. Makita D-33881 Hammer Drill Bit 12mm Length 540mm SDS-Max 2-Cutter