Pre-loaded cannabis oil vape cartridges, hash oil vape pens, or even disposable wax pens. These relatively new and exciting devices have permeated the cannabis concentrate market over the last several years, quickly becoming the go-to concentrate-based product for both the novice and accustomed cannabis fans. The portability, easy functionality and that fact you can smoke discreetly makes it hard not to love them. Brass Knuckles are the pens I prefer due to the variety of strains they provide and they hit great.