High quality spanner for opening and tightening lens retaining rings. Adjustable from 3mm to 73.4mm. The blades are reversible, with flat tips at one end and pins at the other (the hex key is included). This tool has seen only light use and is in excellent condition.

For more details please see:

https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1430