#7 x 40mm(1-5/8'')..Trim head steel screw Qty 100

Also known as "Architrave screws" these have a special small diameter head designed to bury into the timber allowing the head to be covered with filler. Basically they are a #7 gauge screw with a #4 gauge head but use a #1 Power driver bit. They are ideal for fitting detailed architrave’s as they avoid the risk of damaging the contours. The screw is driven in so the head is just below the surface and a small dob of filler is wiped into the hole making it almost invisible. With the small diameter head care needs to be taken when driving as it can split under high torque.

This is a Green colour coded bit or hand driver.