T-Wrench which fits most standard size Banjos
Banjo Head Tightening Key T-Wrench Tighten a Banjo Head easy with the Head Tightening Tool 1/4 inch and 5/16. The same sizes in Millimeter are 6.5 mil = 1/4 7.0 mil = 5/16
1/4 or 6.5 mil T-Wrench fits most standard size Heavier Bluegrass Banjos that have a one piece flange, 3 ply maple rim and flat head tone ring. Banjos patterned after the Gibson Masterone design like Goldtone, Recording King, Gold Star, Gibson, Deering, Stelling, and most resonator bluegrass banjos made today
5/16 or 7.0 mil T-Wrench fits most standard OPEN BACK Banjos with the larger nut size , Goldtone, Recording King, and Deering, and most OPEN BACK Old Time banjos made today
The smaller size fits most beginner banjos with the smaller nut xize like, Oscar Schmidt, Gretch, Fender,Washburn and lower priced Gold Tone beginner banjos like the AC_1, AC_5, CC 100R and other aluminum pot banjos and banjos that cost under 400 to 500 dollars new.
If you have a Deering Goodtime, click to this link, the wrench for those is a bit bigger than the 5/16-7.0 Mil wrench. Deering Goodtime tightening the head wrench.
Ir you aren't sure or have two banjos, try either the three way banjo head wrench or two way banjo tuning key to tighten the head.
The wrenches are money back guaranteed if the standard size does not fit. If you want, you can send an email or call with the type of banjo you have and we'll send the correct size