Scope of application: Bricklayer Made of high quality Carbon Steel material, more . Adjustable screw knob allows precise cuts Cuts perfect circles up to 16 in. Dia in drywall Perfect suitable for making circular drywall openings to accommodate light fixtures, round pipes and other fittings Product name: Drywall drill Application: Household Tool Model Number: Drywall Circle Cutter use: Punching holes on gypsum board Colour:As Shown Material:Carbon Steel Package Contents: 1 * Drywall drill Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.