Snap-Lock Plus hole saw mandrel with 3/8 In. hex arbor, 4 In. pilot bit, 1/2 In. adapter nut, and 5/8 In. adapter nut. Diablo's hole saw system and mandrel design simplify the attachment process for fast and efficient hole saw mounting. Features 2-3/8 In. cutting depth for deeper holes in one pass, tool-free plug ejection, Perma-SHIELD coating for reduced friction and heat, and variable tooth design. One-size-fits-all mandrel fits all Diablo hole saws.