The company also markets waste shredders, mobile wood chippers and information management systems. They are also used around the farmyard to run chippers, grain augers, and conveyors. Drum chippers are normally used for wood residuals from saw mills or other wood industry. For roundwood it is most common to use disk chippers. Chippers can also be interspersed with spacers to finely adjust the dado width. Most chippers currently used by commercial tree care companies are disk-type. Industrial-grade chippers are available with discs as large as in diameter, requiring . On Feb 01, 2013 Power Equipment Direct launched its twelfth niche web store, Chippers Direct. However, evidence indicates that this only characterizes a minority of chippers. Chippers of this type are also very loud. Confined spaces are another such danger concrete chippers face on the job. Chippers of this type have many drawbacks and safety issues. Consumer-grade disk-style chippers usually have a material diameter capacity of .