4 in. Dry/Wet Core Bit for Masonry, Concrete or Stone, 5/8 in.-11 Arbor with 1/2 in. Chuck Pilot Bit Adapter

Versatile dry/wet dual-use core bits with high diamond concentration and soft bonding, for a wide range of applications such as brick, block, pavers or natural stones with Moh's hardness below 4 for dry drilling. For wet drilling, concrete (non-reinforced) or natural stones with Moh's hardness below 7. Includes 1/2" chuck pilot bit with core bit. 10mm segment height with 6 inch drilling depth. Use wet or dry, depending on application and recommended to use with handheld drills (rotary mode only) or variable speed grinders.