MilesCraft 1300 Orbiter. Split body construction. Each half independently rotates a full 360 degrees. Unique, beveled gear assembly allows an infinite number of drill angles. Soft grip handle & lock. Twist to lock or unlock body. Acts as a second handle in awkward positions. 3/8 inch keyless chuck; fits all drill bits up to 3/8 inch shank. 3/8 inch Hex shaft fits 3/8 inch and larger drills. Note: Best results with this attachment are achieved with corded power drills at 1000 rpm or faster with twist and spade drill bits 3/4 inch and smaller. NOT intended for use with: Any drill bit larger than 3/4 inch, hole saw cutters (any size), or auger style bits (any size)