This kit includes everything you need to be able to install a Flue Access Hatch.
It contains:
ROCOL RTD Cutting Compound Tube 50g 
ROCOL RTD® Compound is a soft paste and is suitable for all metals including hardened steels, titanium and nimonics, in even the most severe cutting operations.
It contains technically advanced extreme pressure additives which significantly reduce friction at the cutting edge, giving a superb performance. As a result, RTD extends tool life and promotes superior surface finish, bringing cost-saving efficiencies as well as improved quality.
RTD® Compound is the world-leading, hand-applied, lubricant for reaming, tapping and drilling and has been the market leader for over 60 years. A must-have product for all machine shops, tool rooms and maintenance departments.
Starrett  FCH0314 Fast Cut Bi-Metal Holesaw 83mm 
Starrett Fast Cut Bi-Metal Holesaws provide a smoother, faster cut on a wide range of materials when compared to the previous constant pitch saw. Improved tooth material and 5.5 TPI/25mm tooth form for enhanced heat and wear resistance and greater product life.
Specifically suited to cutting stainless and mild steel sheets, they will also cut through tubes with a wall thickness of up to 3mm (1/8in).
Cutting Depth: 41mm.
Starrett FCH0314 Fast Cut Bi-Metal Holesaw has the following specification: Diameter: 83mm (3.1/4in).
Starrett A10E Arbor to suit 32-210mm Holesaws 30g
A10 Arbor to suit 32-210mm Holesaws. Fitted with a 6.5mm/1/4" pilot drill, with a quick hitch mechanism that enables the user to instantly change hole saws without the use of tools and without removing the arbor from the chuck.
Shank Size: 8.75mm hex suitable to fit a 9.5mm capacity chuck.
Complete with 1/4in Pilot Drill - This arbor has a longer pilot drill for use with the Starrett Fast Cutting Holesaws.