Common Shaft Sizes:  Shafts are 3/8" or less to fit any standard drill.

Core Extraction Holes:  Special holes in back of the "Bell" allow easy removal of cores or plugs.

Nickel Plated:  Reduces bit friction and heat build-up and inhibits rust.

Tip Lubrication Holes:  Provides optimum tip lubrication by allowing water flow in and out of bit.

Grooved Tip Edge:  Provides maximum surface area for diamond bonding and increases water "churn" to optimize tip lubrication.

Bonded Diamond Grit:  Electroplate bonded diamonds for optimum diamond life.