XB-DW2 RotoZip 2-Piece 5/32” Shank High Speed Steel Drywall Bit for Cut-Out Tools XB-DW2 RotoZip 2-Piece 5/32” Shank High Speed Steel Drywall Bit for Cut-Out Tools is designed for slower, controlled cuts of outlet boxes in drywall and should be used in RotoZip cut-out tools. XB-DW2 RotoZip 2-Piece 5/32” Shank High Speed Steel Drywall Bit for Cut-Out Tools features precision 1/8” bits and strength of 1/4” bits which are 5x stronger and 2x faster than Zip Bits.