1 pcs Strap Lock & 1 pcs Flush Mount Jack Has 3 total prongs;. 2 inch long including the prongs (1-5/8 inch long not including the prongs) 5/8 inch diameter Threading: 0.46inch / 1.18cm (outer diameter) x 32 threading Jack Inner Diameter: 1/4 inch hole guitar strap lock: , high quality, flat head straplock Suitable for all kinds of electric guitars Easy to install, convenient to use, each guitar needs two strap locks The spring-action system replaces your strap pegs without any guitar modification and it attaches to your strap and snaps securely into locking position. Material: Copper alloy with chrome plating We are offering you the best 1/4 inch cylinder flush mount jack for your electric guitar or bass. Replace that noisy or malfunctioning jack on your guitar or bass with this great output jack and it certainly help you build a better guitar every day. Jack: Perfect condition- great looks Shape: Cylinder Includes with a rubber washer and a nut Material: Brass material with chrome plating Package Includes : 1 x guitar strap lock 1 x Jack Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.