Measurement Standard String Action Ruler Gauge With Fret Protectors Set For Product Details USEFUL SCALE:Mainly adopting stainless steel, anti-rust and durable.The gauge provides accurate measurement to string height, bridge saddle height, saddle slot depth, pickup polepiece height, fret slot depth and nut height. FRET PROTECTORS:Stainless steel fret protectors in 2 sizes are specifically designed to protect the fingerboard while working on your frets. WIDELY USE:Widely applied for string instruments, such as guitar, bass, mandolin, banjo, etc.Very practical and useful, favorite measuring tools for DIY luthiers, guitarists. MULTI USE:Pocket-sized with multi use on both side. Imperial (inches) One Side, Metric (millimetres) On The Other. With Conversion Chart of String Action at 12th Fret Printed. BEST GIFT:Best gifts for guitarist and Musicians. Great Stocking Stuffer for Birthday, Christmas, New Year, Father's day, Thanksgiving, and Holidays! Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.