Pacific Arc Speed Bow Double Break Leg with Uni Adaptor and Extension Bar Bienfang The BEST keys are an

The BEST keys are an essential tool for adjusting the tension of the canvas material just by the turn of a nut

for making impressions of biological specimens in the field (“photograms”)

Because no adhesives come in contact with the artwork

practice of techniques

Pacific Arc Speed Bow Double Break Leg with Uni Adaptor and Extension Bar Bienfang The BEST keys are anQSB Series Speed Bow Compass Series Professional quality Speed Bow Compass adjusts two ways: press the buttons on the legs for extremely fast adjustment or use the center wheel for fine adjustment. QSB 810C features our signature 6 QSB series compass with universal adaptor and spare parts kits. Individually packed in a hard plastic case with clear cover. Protruding buttons on each leg for increasing or decreasing the width between the compass legs.