Item Type: Hole Opener Material: High Speed Steel Product Model: 1/4in, Approx. 5mm/0.2in, 13/64in, 11/64in, 9/64in, 7/64in, 5/64in Weight: Approx. 282g/9.9oz Scope of Application: Doors and Windows, Hinges, Hinge Openings, etc Package List 8 x Hole Opener 8 x Drill Bit 1 x Wrench Manual measurement, please allow some error. 1High Quality Material: It is made of high quality high speed steel to ensure high hardness, durability and excellent drilling performance. 2Automatic Positioning: With automatic center positioning function, will not move, improve the accuracy and efficiency of the work, easy to use. 3Dual Face Hole: Dual face hole design, can quickly and automatically discharge the sawdust in the holes on both sides, will not make the drill bit stuck. 4Widely Applicable: Suitable for hinges, handles, drawer guides, woodworking, etc, suitable for professionals and DIY enthusiasts. 5Complete Kit: A complete set of drilling kits, hinge drills in 8 different sizes, 1 hex wrench and 8 replacement drill bits to meet your needs.