Budget Window Security Bars (Adjustable) Pack of 6 Supplied with security screws Secure your windows with our adjustable security bars. Pack of 6 bars. These bars are robust and will fit into any space between 28 inches to 48 inches The bars are 1 inch in diameter. Mild steel powder coated in white. Simply screw into position using the 5 mmm hole NOW SUPPLIED WITH ONE WAY SECURITY SCREWS.