Item No.: H47A055

    ADJUSTABLE DIAMETER AND SPACE SAVING:
    This woodworking drill has a variety of adjustable diameters
     from 19-127mm.
    Cut holes of different diameters with just one tool.
    Three three toothed blades can easily cut through and cork
    boards, and their special straight toothed serrations
    ensure fine and cuts.
    Triple blade design, possess straight round effect,
    cutting, no burr.
    Loosen the 3 screws in the middle, then adjust the diameter
    of the hole you want, and finally tighten the 3 screws.
    This hole saw bit is specially designed for cutting solidboard, compressed board, drywall, plastic, etc.Saw blade material：Bi-metalSaw blade number：6pcs （2set）Saw blade hardness：HRC 65.5-66.5
    Connection accessories：Aluminum alloy and 45 steel