The Croc Crusher - 1.5 Inch Herb Grinder in silver is made with Teflon glide rings to make grinding herbs as safe as it is convenient. The rings ensure that there is no contact between the metals inside the grinder as abrasion between aluminum materials can cause small pieces of metal to be mixed into your herbs. Since Croc Crusher Grinders don’t want you smoking (or vaping) aluminum, they fitted these Teflon glide rings to make sure that doesn’t happen.

As an added benefit, it also makes grinding smooth and convenient.