Got a rotary hammer? You'll need these. This is a 10-pack of genuine Bosch SDS-Plus Hammer Drill Bits, each measuring 5mm in diameter and 115mm long (that's about 4.53 inches). They're specifically designed for drilling into tough materials like masonry, concrete, and even reinforced concrete - perfect for wall anchors, cable runs, or any DIY project involving brick or block. The SDS-plus shank fits all standard SDS-plus rotary hammers (just make sure yours is the plus type, not max). Bosch is a trusted name in power tools, so you know these bits are built to last and perform. Having a 10-pack means you've got spares when one wears out (or gets lost in the workshop). They're sharp, durable, and make drilling through hard materials way easier than trying with a regular drill bit. Whether you're a professional tradesperson or a serious DIYer tackling home improvements, these are essential. Keep a pack in your tool bag so you're always ready for the job. No fuss, just reliable Bosch quality in a convenient multi-pack.