1Super magnetic magnet, easy to carpentry clamp, non-slip. 2Updated chip removal hole: an ellipse from step after the double hole removal system, discharge sawdust more smoothly, drilling more convenient. 3Made of high quality aluminum alloy, durable to use. 4The surface of the product is oxidized by oxygen, which is beautiful and resistant to wear. 5Standard calibration ruler, the length limit of the drill bit is convenient and quick.