https://www.lowes.com/pd/Klein-Tools-Non-Contact-Voltage-and-GFCI-Receptacle-Test-Kit/5014355417 Klein Tools Non-Contact Voltage and GFCI Receptacle Test Kit (NCVT1PKIT) on sale for $19.98. Shipping is free on for MyLowe's Rewards Members , or choose curbside pickup where stock permits.