Bi-Metal Holesaw Arbor

A1 Bi-Metal Holesaw Arbor (14-30mm)
Key width 8mm
Hexagon socket adapter
For Bosch Holesaws Diameter 14mm ( 9/16" ) - 30mm ( 1 1/4" )

A2 Bi-Metal Holesaw Arbor (32-210mm)
Arbor adaptor fitted with a 5/8?-18UNF thread plus HSS-G pilot drill bit, these larger Bosch arbors have a width across the flats of 11mm and are suitable for 32mm to 210mm bi-metal holesaws

A1-SDS Bi-Metal Holesaw Arbor
SDS-plus adapter with 1/2"-20UNF thread and HSS-G pilot drill bit (2 608 596 295) for dia. 14 mm, 9/16" - dia. 30 mm, 1 3/16"

A2 - SDS Bi-Metal Holesaw Arbor
The Bosch 2608390036 Bi-Metal Holesaw Adaptor is a holesaw adaptor with SDS-Plus shank and HSS cobalt pilot drill bit suitable for use with Bi-Metal holesaws from
32 to 152mm diameter.
This adaptor is a standard adaptor for conventional toolholder systems.
Super fast removal and installation with Bosch Power Change system
Fits all drills

A19 Starrett OOPS Arbor
The A19 'Oops' Arbor is for use in conjunction with either the A1, A2 or A10 type hole saw arbors (e.g. A1-1, XA2, A1E etc). Replacing the pilot drill, the 'Oops' Arbor allows diameters to be enlarged by attaching a saw of the same size to that of the existing hole. thereby acting as a pilot for the larger diameter saw. Minimum hole enlargement is 4.7mm (3/16") between the pilot saw diameter and the cutting saw diameter.