Features: brand new and high quality Stainless steel tool steel is used as the main body of the knocking rod, which is not easy to rust and not easy to deform. The handle is made of ebony wood, which is durable, wear-resistant, and not easy to corrode. The handle of the rod body is firmly connected, and the copper alloy fixing ring. The tool set is equipped with four different sound hole size pads, which is suitable for the maintenance of each sound hole of tenor, midrange, and soprano saxophone. It can quickly solve the problem of the deformation of the sound hole sheet metal a nd the concave edge of the sound hole. Specifications: Material:Ebony+Stainless Steel Tool Steel+ABS Size:as Picture Shows Scope of Application:Applicable for tenor, midrange and soprano saxophone Product Name:Saxophone Sound Hole Tool Sound Hole Deformation Tool (Applicable for high school for time saxophone) Package Includes: 1 x Repair Tool, 4 x Spacer. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!