Knuckle duster

thingiverse

Reliable Knuckle Duster In stock, this product is designed to fit 21.5 mm index finger width, so users need to scale it according to their hand size using the formula: a-your index finger width (in mm) (a+1.5)/23 x 100% For example, if you have an 18 mm index finger: (18+1.5)/23 x 100% = (19.5/23) x 100% = 0.847 x 100% = 84.7% Keep in mind that all hands are unique and if the size doesn't fit well, you can use a file to adjust it. Disclaimer: Be cautious! This product can be hazardous! It may be prohibited in your country! Remember, this is a toy, not a weapon, and I am not liable for any injuries caused by improper use of this item! Don't forget to like my work and follow me.