Micro-Adjuster fits both the Mast-r-Fence Iii (#173024) and the Premium Ta Fence (#871148). Machined out of 6061 Aluminum and anodized for durability, the Micro-Adjuster is simple to use but extremely accurate. Each revolution is 1/64"" or you can move your fence every 1/512"". Many of the components are machined out of stainless steel, and each Micro-Adjuster is assembled to very strict standards. No router fence is complete without a Micro-Adjuster, so be sure to add one of these to your Mast-r-Fence Iii or Ta Fence.FEATURESMicro-Adjuster fits both the Mast-r-Fence Iii and Ta FenceMachined out of 6061 aluminum and anodized for durabilityEach full revolution is 1/64"" or you can move your fence as accurately as 1/512""Only one Micro-Adjuster is required per fenceIncludes all mounting hardware and detailed instructions