Listo 1620 Mechanical Chinagraph Pencil Box of 12 Color:Red it provides a structured preprinted

it provides a structured preprinted format for recording all information required under BS 5930 — soil descriptions by stratum

An excellent companion product to the Ground Investigation Field Kit

The 8kg drop hammer drives a cone tip into the ground and the blows per 10mm or 25mm penetration is recorded as the DCPI (Dynamic Cone Penetrometer Index)

the Mackintosh Probe is the most widely used dynamic penetration test for determining the N-value (blows per 300mm) of different soil layers to depths of up to 18 metres

Listo 1620 Mechanical Chinagraph Pencil Box of 12 Color:Red it provides a structured preprintedThe Listo 1620 Mechanical Chinagraph Pencil is the professional choice for marking on non porous surfaces in site investigation and field engineering work. Unlike traditional wooden chinagraph pencils, the mechanical barrel eliminates the need for sharpening simply twist to advance the lead. No more broken points, no shavings in your sample bags, and no wasted material. Chinagraph pencils write on virtually any surface glass, plastic, metal, polythene