ELEMENT Dry/Wet Core Bit. DRILLING DEPTH: 2-1/2”. THREADS: ⅝”-11. MAX RPM: 6,500. One of the most popular dry/wet core bits in US/Canada market; Engineered with the most advanced heat-resistant metal bond; T-shape segments effectively prevent segments from coming off; Brazed diamond protection inside & outside of the barrel; Blind-hole bits available from 3/16" to 5/8" in diameter; Material: Engineered Stone, Granite, Quartzite; Dry or Wet use.