Key lockable window catch suits old Alulite, Ocal & Dowell sliding windows. This item is a direct replacement for parts 5-1110 & 5-1300. Replacement spring is 5-1520. 
Brand
Alulite
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* Section 5 - Window Catches, Locks & Fittings
Wunderlich 1W Series sliding window catch with springs. This catch will replace the old 5-1000 Wunderlich catch. For replacement springs see Rollerco parts 5-1560 & 5-1570.
* Section 5 - Window Catches, Locks & Fittings
Obsolete window catch suits Dowell sliding windows. Replacement spring is part 5-1520. This item has been replaced by part 5-1410. For key lockable alternatives see parts 5-1420 & 5-1430.
* Section 5 - Window Catches, Locks & Fittings
Lockable window handle with spring suits Comalco Wunderlich 1C series sliding windows. Replacement spring is 5-1500. This item will replace Rollerco parts 5-1020, 5-1100 & 5-1130.
* Section 5 - Window Catches, Locks & Fittings
Metal window handle set suits Showcase & Godwin sliding windows.
* Section 5 - Window Catches, Locks & Fittings
Window handle with spring suits Comalco Wunderlich 1C series sliding windows. Replacement spring is 5-1500 . This item will replace Rollerco parts 5-1020 & 5-1100. For key lockable version see Rollerco part 5-1140.
* Section 5 - Window Catches, Locks & Fittings
Obsolete Alulite window catch. Use 5-1115 or 5-1300 as a replacement. For replacement spring, use 5-1520.
* Section 5 - Window Catches, Locks & Fittings
Window catch suits Comalco 1C series with springs. Replacement springs are Rollerco parts 5-1560 & 5-1570. For alternatives see Rollerco parts 5-1100, 5-1130 & 5-1140.
* Section 5 - Window Catches, Locks & Fittings
Lockable window handle with spring suits Bradnams & Wideline sliding windows. Replacement spring is 5-1580. This item will replace part 5-1190.