This model allows you to narrow the string spacing to the Gibson-like 10.5mm while maintaining the USA-size plate screw hole spacing. You can narrow the string spacing on your existing USA Strat without modification. The block is made of lead-free steel. Delrin is inserted into the arm hole to prevent arm wobble. The arm is made of break-resistant stainless steel. Everything in the images is included. I think it's a good deal. 【Tremolo Bridge Features】 This tremolo bridge is made of metal, making it durable and able to withstand long-term use. The silver finish is beautiful and enhances the appearance of the guitar. 【Ease of Installation】 It has six mounting holes and can be easily installed on standard guitars. An arm is also included, so it can be used immediately. 【Improved Sound Quality】 The tremolo mechanism adds depth and expressiveness to the sound. You can enjoy a variety of tones depending on your playing style. - Bridge Type: Tremolo Bridge - Material: Metal - Color: Silver - Number of Mounting Holes: 6 - Shape: Flat - Included Accessories: Arm