CORE DRILLING - diamond core bits are designed for soft brick or building block PILOT BIT ADAPTER - includes SDS Plus pilot bit adapter to fit SDS Plus core drills DRILLING DEPTH - 9.5" drilling depth ROTARY MODE - use on rotary mode only USE WET OR DRY - recommended to use with dedicated core drills or core drill rigs Dry diamond core bits with #30/40 diamond grits includes SDS Plus pilot bit adapter and is designed for drilling soft brick or building block. 10mm segment height with 9.5" drilling depth. 5/8"-11 arbor size, use wet or dry with dedicated core drills or core drill rigs. Use on ROTARY MODE ONLY!