Description 3/8″ Carbide Tip Dovetail Bit Every Leigh dovetail jig is shipped with 8mm shank router bits. They are considerably stronger and stiffer than 1/4″ shanks, allowing smoother cuts and faster feed rates with a greater margin of safety. Routers with 8mm or 1/2″ collets are required to use 8mm shank bits. A Leigh 1/2″ to 8mm collet reducer, supplied with all Leigh dovetail jigs, allows 8mm shank bits to be used in 1/2″ collet routers. When used with D-series and Super Jigs Use with Straight Bit No. – 140-8 or 170C Use with e-Bush or Guide Bush – e7 or 711C When used with the RTJ400 Use with Straight Bit No. – 160, 180 or 180C Use with e-Bush or Guide Bush – e10
