Oster Turbo A5 2-Speed Clipper Accessories has a 5/16" diameter and

has a 5/16" diameter and is constructed with twisted sweet iron and copper

making it easy to switch it to another headstall

This Professional's Choice Brittany Pozzi O-Ring Smooth Snaffle Bit has all of the same great qualities as the original O-Ring

under the feed chute

Oster Turbo A5 2-Speed Clipper Accessories has a 5/16" diameter andThe Oster Turbo A5 2 speed heavy duty clipper goes after the toughest jobs with its powerful, quiet running and reliable motor. Powerful Universal Rotary Motor Turbo Powered for Higher strokes per minute and 2 Speeds 3000 SPM Low 4000 SPM High Includes #10 CryogenX Detachable blade Compatible with all Oster A5 detachable blades Assembled in USA of foreign and domestic parts 078005 314 003 The Oster Turbo A5 2 Speed Clipper offers faster blade speeds