XB-DW10 RotoZip 10-Pack 5/32” Contractor Rater Drywall Steel Spiral Saw X-Bit XB-DW10 RotoZip 10-Pack 5/32” Contractor Rater Drywall Steel Spiral Saw X-Bit is perfect for anyone who has to work in difficult materials and is rated for its maximum durability. XB-DW10 RotoZip 10-Pack 5/32” Contractor Rater Drywall Steel Spiral Saw X-Bit is ideal for cut-outs for windows and door openings and is made from high speed steel for quicker, cleaner cuts.