The 5 1/8” ported chain mouthpiece encourages collection, and the chain allows for an ample amount of bend. This Loose Swept Back bit is 7 1/4” long and has a forward mounted mouthpiece which engages quicker than a traditional type of mouthpiece. The port measures 1 1/2". 

5 1/8” mouth 

7 1/4” long

1 1/2" Port 

Chain Mouthpiece