about this product : material the electric rivet gun set is made of forged metal and has high working strength. Alloy steel forged gun head has high hardness, saving time and effort. vertical grip handle the handle is made of hard plastic with non-slip lines, which is not easy to slip with a vertical grip. hexagonal connecting rod stable clamping, can be connected to lithium drill, twist drill, gun drill etc. Suitable for all types of rivets with shaft diameter of: 2.4/3.2/4.0/4.8mm. clamp not easy to slide nails, fast speed and high efficiency, three-clad nail anastomosis design, smooth riveting without burrs, the three-piece structure is not easy to stick. advantage compared to traditional rivet guns, it has lower noise, small size, more efficient and easy to carry. And more economical than manual and more convenient than pneumatic rivet gun. product product specifications : material: alloy steel + hard plastic. color: black gun adapter length: 150mm hexagonal rod diameter: 6.35mm (1/4 inch) key length: 149mm handle length: 123mm Application: draw 2.4/3.2/4.0/4.8mm core pull rivets. installation methods : * step 1: insert the electric drill into the conversion chuck. Do not set the speed too high. * step 2: turn the drill in a clockwise direction to tighten the chuck on the locking chuck. At this point, the electric drill rotates the riveting gun counter-clockwise and makes a dripping sound toward the rivet. * step 3: place the electric drill in the rivet pin in time and align it with the hole. * step 4: remove the drill in the counter-clockwise direction of the rivet. package included : 1 x riveted joint 1 x handle 1 x wrench 4 x rivet heads