This BravePro 15in. Earth Auger Extension with 22mm 7/8in. dia. square connection is designed to fit on BravePro BRP343HHD Earth Auger Powerheads Item# 50313, sold separately to add an additional 15in. of digging depth. Digging Depth in. 15 381mm, Product Type Extension shaft, Tube Size in. 2 w/ 7/8-in. square connection. Extends total digging depth of the BravePro BRP343HHD Earth Auger to 51in. 2in. dia. shaft x 17in. overall height 22mm 7/8in. dia. square auger drive connection Includes connector pin