1,Accurate positioning: easy to measure, matching opening position locator ruler, removable to make the opening more accurate. 2, clear scale: easy to measure the distance from the edge of the door to the center of the required opening, 30-100MM measurable range, so that the opening is more accurate. 3, the hole cutter is not limited by the fixed: more convenient operation, can be moved with the electric drill, the hole cutter and the hole opener separate design. 4,Accurate limit, a key to open the hole: designed for 12MM depth and 35MM diameter holes, hexagonal shank easily without slipping.<br><br>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Red Material:Aluminum Alloy<br><br>Package Contents: 1 x Woodworking Hole Opener Locator Puncher Aid<br><br>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.