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)