The Dual Tube 21 Liner Grooving Tool (18170) improves the liner cutting process after Dual Tube sampling by creating a deep groove into the sample liner. After the groove is made, the sample liner can be safely and easily cut with a utility knife and the sample material can then be removed. A holding device cradles the filled liner and keeps the liner in place during the grooving/cutting process. This new tool is a must to have during the sample retrieval process. Dual tube liners require thicker walls for proper operation and this tool helps operators to efficiently and safely cut through the thicker liners. As shown in Photo D (below), a second groove was made with the grooving tool so a portion of the liner could be peeled away.

	(A) Place the filled liner on the holding device (DT liners will flex under load so it is necessary to use the holding device for successful grooving), then place the grooving tool on the liner 0.25 in. (6 mm) from the end of the liner.
	(B) Pull the grooving tool across the liner, guiding its progress with the rear, tapered handle. At this point, a second groove can be made a few inches away from the first groove.
	(C) Holding a utility knife at an angle tangent to the liner, insert the blade into the groove and follow the groove to the end of the liner.
	(D) Pull back the cut portion of the liner to expose the sample material.