There are mechanical mods, and then there are mechanical mods. This one- is NO JOKE. The Cronus is made in the Philippines, and is a telescopic mod that can use an 18350, 18500 or an 18650 battery. It is made from seamless 304 stainless steel, with nickel plated copper (positive and negative) pins. The top cap and switch assembly are made of bronze. The switch can be locked to prevent accidental firing, and each model is individually engraved with a serial number. For people who want a heavy duty mech mod, look no further. This is it.