12 Piece Package Of Mandrel #1 With 3/32 Inch Screw And 3/32 Inch Shank Each Piece In The Package Is A 3 Piece Set- Mandrel, Screw And Washer The Perfect Accessory For Any Rotary Tool Or Small Drill-package Weighs 1 Ounce Use With Accessories Such As Disc Shaped Buffers, Grinders And Cutoff Wheels The Length Of Each Unit When Assembled Is 1-3/4 Inches Each Bag Contains 12 Units Of This Premium Quality Rotary Tool Accessory