● The rotary spring designed, the position can be moved and adjusted easily and fast. ● Single bevel designed, the deformation of the main body can be automatically corrected. ● Parallelism within:0.003MM/100MM. Squareness within:0.005MM/100MM. ● Material:SK2,Hardness:HRC56°±2. MCL-V15 MCL-V20 MCL-V25 MCL-V30 MCL-V40 MCL-V50 MCL-V60