DRAPER 115mm Segmented Diamond Blade SM20-10 and the cross bar is

and the cross bar is wooden like the rest of the shaft

Face Diameter: 50mm (2 inch)

Screwdrivers Flat: 2

Flashback Arrestor - Oxygen (Regulator) GFA101

DRAPER 115mm Segmented Diamond Blade SM20-10 and the cross bar isDRDBSR115 #99782 SEGMENTED RIM DIAMOND BLADE 115MM Hardened and tempered diamond blade with segmented rim for a faster cut. General purpose blade for use on concrete, bricks, stone, granite and marble. Suitable for dry and wet cutting, with optimum results when used wet. Compatible with most angle grinders with a 22. 23mm bore. Specification: Diameter 115mm Bore size 22. 23mm Segment height 10mm Maximum speed 13,300rpm Kerf 1. 9mm