A pilot pin or centre pin is a kind of guide pin for core drills.
The pilot pin allows for accurate positioning of the cutter.
The pilot pin is also used as the central focal point. It centralises the position of the hole on the pre-marked steel.
A pilot pin controls the flow of oil.

Fe Powertools pilot pins (center pins)

For your easy reference see the below list with overall sizes of the available pilot pins.

FEPP75 – For FE30 – Range ø12-60mm – Connection 19mm(3/4”) Weldon

FEPP90 – For FE30 – Range ø61-130mm – Connection 31.75mm(1- 1/4”) Weldon

FEPP100 – For FE55 – Range ø12-60mm – Connection 19mm(3/4”) Weldon

FEPP120 – For FE55 – Range ø61-100mm – Connection 31.75mm(1- 1/4”) Weldon

FEPP275 – For FE110 – Range ø18-50mm – Connection 19mm(3/4”) Weldon

FEPP75 – For FET35 – Range ø14-60mm – Connection 19mm (3/4”)Weldon/Nitto”one touch”

WelFEPP90 – For FET35 – Range ø61-130mm – Connection 31.75mm(1- 1/4”) Weldondon

FEPP100 – For FET50 – Range ø14-60mm – Connection 19mm(3/4”) Weldon

FEPP120 – For FET50 – Range ø61-100mm – Connection 31.75mm(1- 1/4”) Weldon

FEPP275 – For FET110 – Range ø20-120mm – Connection 19mm(3/4”)/31.75mm(1- 1/4”) Weldon

FEPP75 – For FETR30 – Range ø17-36mm – Connection 19mm(3/4”) Weldon

FEPP245 – For FET75 – Range ø20-120mm – Connection 19mm(3/4”)/31.75mm(1-1/4”) Weldon