Can I use shock mode? Can't. Shock and hammering modes can seriously damage bit life. Can I drill concrete? Yes, but harder materials require water or coolant. Can I use a cordless drill (lithium drill)? You can. but it is recommended to choose a power higher than 24V. Is it good to drill plastic or wood? Works very well. Can dry drill wood, plastic, masonry, concrete, etc. We have something to say! 1.Usage: General purpose product, capable of drilling a variety of materials, and can assist other drills to provide more accurate drilling and positioning. 2.Applicable material description: Materials that can be drilled dry (softer materials): wood, plastic (PVC pipe), foam bricks, antique bricks, glazed bricks, red bricks, cement, concrete (need to avoid reinforcing steel), and so on; Materials to be drilled with water or coolant (harder materials): glass tiles, full ceramic tiles, ceramics, marble, glass, etc; 3.Applicable machines: 1.Ordinary hand drill, table drill and rechargeable drill (lithium drill) and other types of machines to use; if you choose lithium drill, it is recommended to choose the power higher than 24V, otherwise it is easy to insufficient power to hit; 2.The drilling mode can only choose flat drilling mode, can not use the impact and hammering mode; (no need to 45 degrees oblique angle positioning, vertical drilling can be)