• Standard bits have a 12/32 NEF thread to suit the Stanley machine
• Bits marked UNF fit the Porter Cable Machine eg. Archer
• Extension arbors (96mm long) are copies, Archer etc available to suit both NEF and UNF threads
• TA22 for NEF
• TA24 for UNF

Product Info

• B INCH: 0.59
• B MM: 15
• THREAD: 1/4 UNF
• A INCH: 13/16
• A MM: 20.6