This versatile 6" bar scriber works both as a wall scriber and a seam scriber

7" Hook and Loop Backer Pad is recommended for maximum 3000 RPM machines

Rotating the adjustment wheel counterclockwise yields a deeper groove (+)

In addition

Crain 905 Heat Bond Iron Straight Edge This versatile 6" bar scriberThe 905 carpet iron super low profile and the ultra narrow handle makes it easier to get the seam together near the back of the iron. Dual indicator lights show both power on and heating status. Self cleaning base and 12' long cord are standard on the 905 carpet iron. Heavy duty handle and riveted tray are highly durable. Heat range 220 to 425 F.