Milwaukee SDS-Plus Drill Bits offer maximum drilling speed and durability. This 5-piece set is designed for masonry and includes bits with sizes ranging from 5.5mm to 8mm. The set contents are: 5.5 x 160 mm, 6 x 160 mm, 7 x 160 mm, 8 x 160 mm, and a 5.5 x 110 mm SDS+ Drill Bit. These premium quality bits are easy to use.