Spanner Wrench for Retaining Ring Spanner Wrench is used to install and adjust retaining rings in lens tubes, lens mounts, rotation mounts and other Opto-Mechanics. Salient Features • Spanner Wrench for SM1-Threaded Retaining Rings.• Simple to adjust retaining rings without risking damage to optical elements.• Knurled Handle for Improved Grip.• Made in INDIA Product CodePriceAdd to cartSET-SW-SM1₹3000Add to cart For inquiry and orders contact SciEngTechsol@gmail.com