Description These hole saw arbor are for use with our hole saw blades. They are industry standard so are interchangeable with arbors and saws from other brands. They have a 3/8" hex shank and so fit securely in the chuck of most mid-size and larger drills. Spin Welding Tools & Fittings Polyethylene Fittings VTS-344 Spin Weld Drivers VTS-624 Hole Saw Blades VTS-436