Compact injection molded hole saw kit box with carrying handle. Three trade specific configurations contain the most commonly used sizes. Utilises C-clamp design with tool free clamping and no surface damage, compatibility for the two most common backsets and door thicknesses. Includes: 1″, 2-1/8″, mandrel, adapter, drill guide, replacement parts (including two additional pilot point centering bits), two adjustable bushings which accept both standard backsets and both common door thicknesses, and new quick change mandrel for increased user productivity.