The Grover Perma Tension tenor banjo metal button tuning pegs provide you with slip-free, accurate tuning for your tenor banjo. Patented friction-style pegs lock permanently into your banjo's headstock, eliminating slack and ensuring your strings stay in tune through even the most intense playing sessions. You'll spend less time fine-tuning and more time making music. The heavy-duty threaded bushings and countersunk tension screws stand up to years of tuning and retuning. With a range of 11 mm to 15 mm, these pegs fit a variety of tenor banjo headstocks. The .074 maximum string gauge accommodates most banjo string sets. Perma Tension banjo pegs drop into your existing pegholes for an easy upgrade to slip-free, precision tuning.