6 pcs/set Mortising bits can be produced with left or right. 6 pcs/set Mortising Bits With Wooden Case (F) ITEM NO.: DY0706106 Description: Shank Diameter: 16mmWorking Diameter: 6mm, 8mm, 10mm, 12mm, 14mm, 16mmLength: 105mm, 115mm, 125mm, 135mm, 145mm,155mm