Unparalleled Drilling Speed The HiSpeed diamond bits offer a fantastic drilling performance under any circumstance but the true nature of these bits is unleashed when drilling in high strength and heavily reinforced concrete. with drilling speeds more than doubling and often even tripling, the HiSpeed bits are unparalleled on the market today. Thin Kerf Bit Design The new HiSpeed bits, with a kerf thickness half that of most bits, require far less bit feed pressure, which allows for faster penetration.This lower feed pressure also permits down sizing the motor, column and base to achieve small lightweight rigs. Lightweight means faster setups, which translates into more holes per day!