Function: the square center scribe measuring tool can be applied to measuring the center point and marking soft metals or wood and is also suitable for finding precise centers for example use the matching steel ruler to draw 2 lines at random and the intersection point is the center of the circle Materials: the square center scribe measuring tool is made of aluminum alloy processed by multi-axis precision equipment sandblasted and anodized resistant to twisting durability and corrosion resistance Scope of application: the center finder tool is suitable for marking centers on discs and shafts; The maximum stretchable 45 cm circular centeine can also draw 45 and 90 degree lines; A steel ruler can be applied as a positioning block The kit includes: 1 square center line measuring tool 1 detachable steel ruler 1 screw and 1 screw rod; The square center scribe tools are doing well in production and are accurate in measurement making them a wonderful choice for woodworking Attention: remark: with or without logo ship by random 300cm ruler is metric size according to industrial standard Due to different Monitor the color may have difference Due to hand measure Please allow 1-3% difference tolerance Due to long shipping the item may damage in transit if the item damage pls contact us firstly immediately before leave feedback thanks for your understanding Origin:Mainland China DIY Supplies:Woodworking Certification:None Model Number:JDCXR-30