ITEM NAME:2pcs Guitar Truss Rod Adjustment Wrench for Martin Acoustic Electric Guitar Product Description Description: 2pcs 4mm/5mm Metal Guitar Truss Rod Adjustment Lever Wrench for Martin Acoustic Electric Guitar Musical Instrument Luthier Adjust Tools Feature: 1. For Martin or other guitars that cannot be adjusted with a regular hexagon wrench truss rod. 2. Two-way L-shaped truss rod adjustment tool. 3. Made of carbon steel, durable and highly wear-resistant. 4. Suitable for most acoustic guitar, electric guitar and bass. Specification: Material: Metal Size: 12.5x7.5cm/4.92x2.95in Type: 4mm + 5mm Applicable instrument: for Martin guitar Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 X 4mm Guitar Wrench 1 X 5mm Guitar Wrench.For Martin or other guitars that cannot be adjusted with a regular hexagon wrench truss rod. Suitable for most acoustic guitar, electric guitar and bass. Included: 1 X 4mm Guitar Wrench. 1 X 5mm Guitar Wrench.