Would it fit my guitar? Please pay attention to one of the most important parameters: Shank Diameter. We have investigated the pin hole diameter of brands guitars as follow: Martin, Fender, Taylor, Gibson, Yamaha, Ibanez, Record King, Dove. 5.33mm is a comprehensive consideration, suitable for most guitar pin holes.Our suggestion: Measure your old pins before buying. Why it's not oversized? Actually, We thought about that to make them into oversize, because players can make them smaller, but not bigger. If the diameter is large enough, you can process it to fit any guitars. Cattle bone is hollow, only a small part bone wall can reach this size. In order to ensure the integrity of bone, oversize will bring high cost of produce and material. Oversize pin only used on a few guitars and will take extra processing cost for standard guitars. Why do you choose Vencetmat bone bridge pins? 1.Cattle bone will eliminate the jerky tuning and improved the tone. 2.Never again warried about break off pins when unloading strings. 3.Unbleached means they aren't damaged by any chemicals, Keep most primitive condition of bones. 4.Our bridge pins were inlaid abalone dot, improve appearance of your guitar. 5.Even a pin puller was included, your right-hand man when unloading pin. 6.Suitable for all levels players. 7.Yes, You'll got a great and nice set of pins by an amazing price. 8.What else do you want? How to distinguish bones genuine or sham? 1.Bone textures can be found on surface. Clearer in strong light. 2.Throw it on hard ground, a pleasant impact sound will got. 3.Burn it, the roast smell will come out.Be careful to be smelled by your dog. 4.You absolute can't break off it without any tools except Hulk.Package Contents: Bridge pins x 6 Pins Puller x 1