An SDS drill is a powerful type of hammer tool that is best suited for heavy-duty drilling applications. SDS stands for Slotted Drive Shaft or Slotted Drive System. These drills are typically used for drilling into materials such as brick, stone, concrete, and other types of masonry. Unlike regular drills, SDS drills have a unique design that provides a high level of power during drilling. They also allow you to use the drill in three modes - rotary, hammer, and rotary/hammer. SDS drills use SDS bits, which are placed into the chuck to create a rotary hammer or hammer drill. The main types of drill bits used in these tools include SDS Plus and SDS Max. SDS Plus bits are smaller and thinner, with two open grooves and two closed grooves, while SDS Max bits are thicker, with three open grooves that are attached to locking segments rather than balls. The specialized chuck of an SDS drill only accepts SDS bits, which feature indentations along their shafts that fit between the ball bearings within the chuck. An SDS drill can make drilling through tough materials such as masonry, concrete, hardwood, and steel quick and easy, without the risk of drill bits breaking.