Product Details
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Contract Door Security Bolt, sometimes called a Rack Bolt. The bolt is morticed inside the door edge and can be locked or unlocked via a separate splined key or with a fixed splined turn
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The bolt has an internal sawtooth rack mechanism into which the splined key is inserted. The spline engages with the rack teeth and forms a gearing action which smoothly operates the bolt
(KEYS SOLD SEPARATELY)
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Available Finishes: Polished Chrome, Satin Chrome Or Electro Brass
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Dimensions: 85mm, 57mm Centres, Supplied Complete With Both Radius & Square Keep PlatesÂ
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The Hex/Rack Style Keys Required To Operate These Door Bolts Are Sold Separately, Please See Related Products Below

Frelan Hardware Automatic Door Closer Keep Clear (75mm Diameter), Polished Stainless Steel
CODELOCKS CL2200 Electronic Digital Lock Surface Deadbolt PVD B/Steel
Zoo Hardware TDFK37-CP Round Cabinet knob 37mm Dia. Polished Chrome Finish
Mortice Rack Bolt (57mm Backset), Polished Brass 
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