A2 and A4 arbor set for major brand hole saws (diameter from 16 to 152 mm, 5/8 to 6 inches), HSS bi-metal hexagonal drill bit adapter for hole saws

Suitable for all bi-metal hole saw diameter sizes: 16-152 mm (5/8"-6")

Equipped with a high-quality 1/4" HSS4241 guide drill bit

Quick-release locking system

Includes A2 + A4 adapters: A2 adapter: 5/8-18UN, 11 mm shank, 115 mm overall length; A4 adapter: 1/2-20UN, 9.5 mm shank, 95 mm overall length. With wrench.

Professional tools for commercial or occasional use