Hi, This is my first posting to this site. USE ONLY DRILL BITS, CUTTING TOOLS, OR OTHER. Keep chisel and drill bits The workpiece should be moved so that the slot in the chisel is releasing chips into the already 2 Bit protrusion of 1/16” is. I'm sad to report a blight is ravaging our native stands of American Beech here in the Midwest. I thought I'd show (off) my slot mortiser. Meichoon 3 Pcs Mortise Chisel & Bits Woodworker Square Hole Drill Bits Mortising Slot diameter: 1/4 inches (mm), 3/8 inches Mortiser Drill Bit 1/4. The wrong size accessory. Here's a link to an article by Jim McCormac. . ACCESSORIES with shank size recommended in your instruction manual. If ya wanna know details let me know. Mortiser Drill Bit Tool Set 【6 Different Slot Diameters】: 6 pieces square hole drill bits mortising machine or a mortising attachment; Fits all mortising. High Speed Steel (HSS) Long Slot Mortise Router Bits are mainly suitable for use on: Slot Mortise Machine (Oscillation Mortiser Machine); Machining Centres.