Parameter Standard: American 16 CFR 1500.48/ASTM F963 4.8 standards European Union EN-71 19988.2 China GB 6675-2003 A.5.9 standards Size: 41x41x66mm Weight: 489g Material: stainless steel S.S.T Package include Sharp Edge Tester*1 Foot pedal switch*1 Power supply charger*1 Table mounting bracket*1 Testing Tape*1 Operation manual*1 Instruction 1. Roll a circle of test paper around the edge tester head. The overlapping size should not exceed 0.1in (0.25mm). 2, fix the sample to keep the test edge can not move or bend. 3. When the position of the touchable side of the assembled toy is not enough for the experiment, the sample should be removed for testing. but if the removal will affect its hardness, you can fix it by other objects, but the support area can not be larger than the tested object. 4. The Angle between the tester and the test side is 90°±5°. 5. The contact point between the edge of the test object and the adhesive tape should be about the middle of the adhesive tape. 6. The most unfavorable position of the tested object shall be tested 7. Adjust the strength of sharp edge tester to 1.35lbs (6N). 8. Apply upward force to the position of the test tape to make the indicator light. At this time, the test edge force is 1. 35 LBS. 9. Turn on the sharp edge tester switch to make its shaft rotate one circle. 10. Carefully disassemble the test paper and do not expand the cut size. Measure the cut length with a steel ruler. 11. If the cut length exceeds 0.5in (12.5mm), the test edge is a sharp edge.