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The Calculated Industries Construction Master Pro Trig Calculator has all the features of a desktop construction-math calculator in a handheld device
an accuracy of ±3/16 inches at 30 feet
Glide Action – unmatched smoothness of cut
reviewing of calculations become more efficient
329370070 P3-GL Large Blue w Reflector Mirror
Topcon DB-74 Alkaline Battery Holder for RL-H4C & RL-SV2S Lasers | 313680403 TS56692 The Calculated Industries Construction MasterThe BD 74 Alkaline Battery Holder for Topcon RL H4C and RL SV2S Laser is a good replacement accessory that can hold four D cell alkaline batteries to power the Topcon RL H4C rotary laser and RL SV2S grade laser. This battery holder is made of durable plastic with black and yellow finish to fit the lasers overall color. Plus, it comes with a knob which enables surveyors to lock the holder to the laser and secure the batteries.