The product is an electronic locator to fix the drills, milling cutters, and other tools, grinding tools. You can rotate the directly to the electric grinding in the holder for fixation. It has different depth readings (3/4, 1/2, /4 inch) where you can adjust by sliding the shaft up and down, change depth of by turning the shaft and locks it tight with the screw attached on the side. Suitable for wood, ceiling tiles, drywall, laminate, fiberglass, plastic and vinyl siding cutting. Features - Color: Black - Material: Plastic - Total length: 25mm - Installed on the pitch connector with the diameter of 18mm, 1.5mm. - Used to fix the drills, milling cutters, grinding tools and other tools. You can rotate the directly to the electric grinding in the holder for fixation. - Allows for sturdy, controlled cuts in a variety of materials, such as wood, ceiling tiles, drywall, laminate, fiberglass, plastic and vinyl siding cutting and grinding. - Has easy depth adjustment. With different depth readings (3/4, 1/2, /4 inch) where you can adjust by sliding the shaft up and down, change depth of by turning the shaft and locks it tight with the screw attached on the side. Package list: 1 x Grinding positioner