For access to very tight areas. The WES900 series is designed to fit 1/4"-28 threaded drill bits and has a 1/4" round shaft. Choose from straight, right hand, or left hand styles with various offsets. A 1/2" round handle is standard, with an optional 11/16" hex handle available. Also known as a L-Type drill attachment, drill offset, drill right angle attachment, pancake drill attachment, or drill offset adapter.