Bonded Diamond Grit: Electroplate bonded diamonds for optimum diamond life.
Nickel Plated: Reduces bit friction and heat build-up and inhibits rust.
Grooved Tip Edge: Provides maximum surface area & increases water "churn" for tip lubrication.
Tip Lubrication Hole: Provides optimum tip lubrication by allowing water flow in and out of bit.
Core Extraction Hole: Special holes in back of the "Bell" allow easy removal of cores or plugs.