Arrow - MK33BD-10B - Asylum Cylindrical Ball Knob Locks - 2-3/8” Standard Backset - Oil-Rubbed Bronze - Grade 2
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Arrow - MK33BD-10B - Asylum Cylindrical Ball Knob Locks - 2-3/8” Standard Backset - Oil-Rubbed Bronze - Grade 2

  • Product SKU: ARW-MK33BD-10B
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Arrow - MK33BD-10B - Asylum Cylindrical Ball Knob Locks - 2-3/8” Standard Backset - Oil-Rubbed Bronze - Grade 2

The MK Series is available in several finishes and functions that make them ideal for commercial applications where heavy duty grade one hardware may not be necessary.

  • Lock Chassis: Cold rolled steel with zinc dichromate finish for corrosion resistance. Requires standard 2-1/8"(53.97 mm) bore through door.
  • Backset: 2-3/8"(60.32 mm) standard. 2-3/4"(69.85 mm), 3-3/4"(95.25 mm) available.
  • Door Thickness: 1-3/8"(34.92 mm) to 1-3/4"(44.45 mm) Latch – Brass with 1/2"(12.7mm) throw.
  • Latch: Latch housing is steel, with zinc dichromate finish for corrosion resistance. 7/8"(22.225 mm) bore in edge of door is required.
  • Latch Front: Brass or bronze. Standard faceplate for 2-3/8"(60.32 mm) backset measures 2-1/4"(57.15 mm) x 1"(25.40 mm), with a flat front, for 2-3/4"(69.85 mm) standard faceplate measures 2-1/4"(57.15 mm) x 1-1/8"(28.57 mm), with a beveled front 1/8"(3.17 mm) in 2"(50.8 mm).
  • Strike: Brass, bronze or stainless steel. Standard “T” strike measures 2-3/4"(69.85 mm) x 1-1/8"(28.57 mm). Optional ANSI A115.1 strike measures 4-7/8"(123.82 mm) x 1-1/4"(31.75 mm). All strikes have a 1-1/4"(31.75 mm) lip to center dimension.
  • Handing: Reversible.
  • Cylinder, Standard: Solid brass 6 pin cylinder with Arrow "A” keyway, keyed to 5 pin for stock. Supplied with two 5 pin brass keys for stock.
Product Specifications:
Vendor Assa Abloy
Manufacturer Arrow
Grade Grade 2
Installation Commercial
Origin Mexico
Unit of Measure Each
Base Material Bronze
UL Listing Type BHMA A156.2, Series 4000, Grade 2, UL Listed
ANSI Number F87
Technical Specifications:
Function 33-Asylum
Function Family Institutional
ANSI Function F87 - Asylum
Lever/Knob Design BD - Ball Knob
Lever/Knob Design Family Ball Knob
Rose/Escutcheon Design 2-9/16" Rose Diameter
Rose/Escutcheon Dimensions 2-9/16"
Cylinder Type Conventional Cylinder
Num Pins 6
Key(s) Cut
Num of Keys 2
Handing Non-handed
Door Thickness 1-3/8"to 1-3/4"
Std. Latch Number 114
Std. Latch Type Deadlatch
Std. Latch Backset Dim 2-3/4"
Latch Bore Diameter 7/8"
Lock Face Size 1-1/8"x 2-1/4"
Bolt Projection 1/2"
Bore Hole Diameter 2-1/8"
Std. Strike Number 300
Std. Strike Type T-Strike
Std. Strike Height 2-3/4"
Std. Strike Width 1-1/8"
Screws Wood/Machine Screws
Product Type Cylindrical Lock

Shipping Policy

All orders are shipped between 24 hours or less Monday through Friday from 9:00 am to 6:00pm. Orders placed after 3 p.m. EST will be shipped next business day. 

We may use the following carriers; FedEx, USPS and UPS. Our orders ship via FedEx within 48 continental U.S. states, Canada , Alaska, Hawaii and Puerto Rico. FedEx does not service P.O. Box or APO/FPO addresses .

We start processing the shipment of orders after we processed the payment.

We reserve the right to hold off shipping any orders that look fraudulent until we have a confirmation from a bank issuing a card

We are not responsible for lost or stolen items delivered in accordance with our shipping and delivery practices listed above. We are willing to work with a carrier to resolve any issues regarding your delivery.

Once a package has been shipped out per your order specifications, it is literally out of our hands and becomes the responsibility of the shipping carrier selected. We can't stop, delay or expedite any shipments once they have been shipped.

Only shipping services which have the transit time in the title (Next Day, Overnight, 2-Day, etc.) are guaranteed transit times. All other transit times (Ground, Priority, etc.) are estimates and are not guaranteed by the carrier or by LOCKSMITH KEYLESS. Shipping delays due to weather are not refundable as per the shipping carriers. Saturday delivery is not a guaranteed service. If Saturday delivery is selected and the shipment does not arrive on Saturday no shipping charges can be refunded.

Puerto Rico, Alaska & Hawaii

Orders to Puerto Rico, Alaska & Hawaii will not qualify for free shipping if they have ANY Hardware products on them and/or Key Machines. Only Automotive products are eligible for Free Shipping.

Weekend Orders

All orders placed after hours Friday, Saturday and Sunday will be shipped on Monday or the next business day in case of a holiday.

Friday - Overnight orders placed on Friday must be done before 2PM Eastern. Friday Overnight deliveries will arrive Monday unless a special Saturday delivery Overnight option is checked. 

Saturday and Sunday - Orders will be shipped on Monday or the next business day in case of a holiday.

International Shipping

For international shipping, please note that you may be responsible for paying any possible customs and import duties at the time of delivery, however you should only worry about those fees if you order several hundred dollars worth of goods shipped outside the US. We are unable to determine these fees during the checkout process. You can contact your local Customs office for details.

Signature Requirement

Signature required may be requested on the shopping card. It is optional.

Missing Items / Discrepancies

Any wrong item or missing item(s) must be reported to us within 48 hours from delivery. We cannot replace or compensate for missing items after the 48 hour period.


Cancelled orders may be credited as a store credit or refunded with a 3% to 10% credit card fee.

No-Hassle Returns

If you a Locksmith & are not satisfied for any reason, products may be returned within 30 days of purchase for a store credit or exchange. Certain restrictions apply.

See Returns Policy