Redi Trench 48 in. x 72 in. Single Threshold Shower Base with Left Drain and Solid Brushed Nickel Trench Grate Hand Tool Sets Sub Brand Unibit Brand Model Compatibility Universal 845596400 Sub Brand Unibit Brand Model Compatibility Universal Number of Hole Sizes 12 Diameters of Holes Drilled 1 8 in to 1 2 in Step Size 1 8 in Shank Size 3 8 in Shank Type Hex Material Black oxide coated HSS Set Individual Set Package Quantity 3 Warranty None CA Residents: Prop 65 Warning(s) Yes Budget Friendly Update: Transform spaces quickly without the cost of traditional tile tile application required (tile not included) or barrier free entrance