1 x 17 3/4" Tapered Pilot Bit for up to 16" deep Core Bits 
Fits Diamond Core Bit Adapters with Tapered Socket ( Available Separately)
Overall Length 17 5/8" long Protrudes through our 15" Deep Cores by about 3/4"
When used with our Adapters.
(Protrudes from bottom of Adapters 16 1/2")
TCT Tip approx 3/8" (10.4mm)
Remove Pilot with Drift once Hole has Started.