These jaws are an excellent choice for hollow forms or turning unseasoned timber. 71-106: Z4 Chuck, 50mm Jaw, Woodscrew and Chuck Key - Insert Type - Rikon Power Tools Grip Jaws For Rough Timber CK-2.75Z-SJ Step Jaws For BMWOOD CK-2.75" Series Woodturning Lathe Chu Hollow Form Turning Jaws These ripple jaws feature deep, ribbed grooves on both the outside and inside of the jaw, providing a strong and powerful grip on rough or bark covered wood. The amount of movement available offers a range of mm internal and mm external. These jaws are an excellent choice for hollow forms or turning unseasoned timber PLEASE BE CAREFUL NOT TO PURCHASE THEM BY MISTAKE! Gripper Jaws - Chuck Jaws - Woodturning Chucks - Woodturning - Activities | Axminster Tools This series of jaws are ONLY compatible with our BMWOOD brand's 2., 75-inch chucks and CAN NOT be matched with other brand chucks on the market.