It's a special tough drill that fits rotary hammer drills like Hilti and Bosch.
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The SDS system is used on drills that drill through stuff like concrete. The bit has a standard size male part with four grooves in it. The drill chuck has four fingers that mate with the grooves on the bit shank. To change bits you just pull the old one out of the drill with your hand and push the new one into the chuck. It's very slick. They even sell a Jacobs-style jaw chuck adapter for it, so you can use all your non-SDS bits with an SDS drill.
Special Direct System drills are heavier than regular drills, have a hammer action and a chiselling action and take larger drill bits and chisels.
This refers to the type of detergent used to lyse cell membranes when extracting DNA from cells. SDS=Sodium dodecyl sulfate, CTAB=Cetyl trimethylammonium bromide
The SDS-plus is the most common shank for bits that fit medium sized hammer drills. It was developed by Hilti and the initials mean "insert, twist, secure" in German.
Hss drill bits, Titanium coated drill bits and brad point drill bits.