1/4 x 12-In. High-Speed Black Oxide Drill Bit Bathtubs & Showers Aluminum side rails are full

Aluminum side rails are full channel extrusions on the front and modified channel on the back legs

Almost as fast as a reciprocating saw

5/8" x 12"

cement based

1/4 x 12-In. High-Speed Black Oxide Drill Bit Bathtubs & Showers Aluminum side rails are fullMaster Mechanic, 1 4" x 12", Extra Length Black Oxide Drill Bit, 135 Point Angle With 4 Cutting Edges Which Eliminate Walking & Provide Fast Penetration, Black Oxide Tempering Treatment Reduces Frictional Resistance & Improves Chip Flow, Recommended For Wood, Plastic, Wallboard, Plywood & Soft Metals, Aluminum, Brass, & Bronze, For Occasional Use In Stainless Steel & Other Hard Metals, Carded.