Features 1、Provide an accurate starting point for steel and other solid materials. 2、Allows you to easily mark the workpiece with one hand before drilling, which prevents the bit from sliding. 3、Then the automatic spring is loaded at the top of the loop to release. 4、The spring pressure can be adjusted by rotating the top of the knurled punch. 5、100% brand new and high-quality. Specification Features: Provide an accurate starting point for steel and other solid materials. Allows you to easily mark the workpiece with one hand before drilling, which prevents the bit from sliding. Then the automatic spring is loaded at the top of the loop to release. The spring pressure can be adjusted by rotating the top of the knurled punch. 100% brand new and high-quality. Specification: Size:8*23*101mm/0.31*0.91*3.98in Type:1.5mm/2mm/3mm Package List: 3*Marking Punch Package List