The No. 129 needles are a pack of 50 replacement needles which can be used on most all Crain dividers and scribers. They are .063″ in diameter, 7/8” In length, and have a sharp point. These needles can be used on the following Crain dividers and scribers: No. 109 Pin Vise, No. 110 Inside Cove Corner Kit, No. 188 Hinge Scriber and No. 382 Double Needle Dividers.