1. [Strong Penetrating Power] The concrete nail gun has strong penetrating power, the concrete nail gun can pierce 3mm steel plate in one step in only 0.1 seconds. The nail gun is suitable for nail length: 25mm nails. Can penetrate: red brick wall, concrete, 3mm steel plate, thick plate. 2. [Strong penetrating power] Concrete nail gun has strong penetrating power, concrete nail gun only needs 0.1 seconds to pierce 3mm steel plate in one step. The nail gun is suitable for nail length: 25mm nails. Can pierce: red brick wall, concrete, 3mm steel plate, thick plate. 3. [One-handed Operation] Manual steel nail gun is light weight and small size, weighing 1kg. Girls, old people, children can also easily complete nail work. Easy to operate and carry to various scenes. 4. [Wide Application] Suitable for camera installation, electrical box installation, plumbing installation, air-conditioning installation and hanging photo frames, multi-functional shelves, small junction boxes, pipeline installation, tying wires and so on. 5. [ Technology] No residue. Low noise - can be used in inhabited buildings. Low maintenance. No direct impact parts. Narrow profile. Light weight. Colour:As Shown Material:Plastic + Metal Package Contents: 4 x Nail gun 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.