KNITPRO Basix special interchangeable needle tips help you assemble compact circular needles for hats, cuffs, and other small-circumference knitting. This listing includes one pair of short interchangeable tips in 4.50 mm, made to connect with compatible KNITPRO cables and end caps (sold separately). Smooth wooden tips provide a warm, controlled feel for steady tension and clean stitches; wipe clean and store dry after use.