Simple, Easy-to-use, Surface Temperature Detection. Reliably accurate - melts within ±1% of rated temperature. Lasts longer than other brands because of greater density. Holder provides strong grip on the chalk avoiding slippage. Production Lot Numbered for traceability; Certification of accuracy documentation is available.

How to Use: Mark the work piece before heating or stroke the work piece during heating. When the rated temperature has been reached a distinct melt (smear) will become evident.