Akeda 3858 is a 0.350-Inch Box Joint Cutter Router Bit. This Akeda 0.350-Inch (8.9mm) diameter x 1-Inch (25mm) long box joint bit with 8mm shank is used to form variable 3/8-Inch - 5/8-Inch box joints with the half blind guide fingers included with the jig. This bit has an 8mm shank, so you may need a 1/2-Inch to 8mm collet reducer for your router.
0.350" Box Joint Cutter Router Bit - 3858
Cutting All Standard-Sized Through Dovetails Systems, Box Joints Dust-Free with the AKEDA Dovetail Jigs