This SUTTON TOOLS HSS Holesaw Pilot Drill Bit supports the SUTTON TOOLS UA Series Standard Holesaw Arbors and the QF Series Quickfit Holesaw Arbors.
Specifications

Diameter: 6.35 mm (1/4″)
Length: 104 mm (4-1/8″)

For use with

SUTTON TOOLS Holesaw Arbors

UA Series – Standard Holesaw Arbors

H112UA1 – 14-30 mm
H112UA2 – 32-54 mm
H112UA3 – 32-152 mm

QF Series – Quickfit Holesaw Arbors

H103QFX – 32-152 mm
H103QFX2 – 14-152 mm (14-30 mm stacked)