The Festool KA-UG-KS 120 R/L/D Extension Set (578921) is a left and right miter saw extension wing system designed to expand the workpiece support area on Festool KAPEX KS 120 and KS 120 REB miter saws. Used in conjunction with the UG-KAPEX KS 120 Underframe, this folding extension set provides edge-aligned material support from 58.26 in. (1,480 mm) up to 94.48 in. (2,400 mm) to keep long trim, crown molding, baseboard, and framing stock stable during precision length cuts.

Engineered for versatile jobsite and shop setups, the extension wings mount tool-free using Festool's V-groove attachment interface. Each wing features an integrated telescoping extension, a measuring scale system, and an adjustable flip stop for making fast, repeatable cut lengths. When using the KAPEX saw without the underframe, the support legs fold back completely, allowing the extension wings to rest flat on the floor or work surface to maintain an identical working height across the entire setup.

Features & Benefits

• Extended Stock Support: Expands from 58.26 in. (1,480 mm) to 94.48 in. (2,400 mm) to support long timber, rails, and trim stock up to approximately 8 ft. (2.40 m).
• Tool-Free V-Groove Mounting: Connects quickly to the KAPEX saw or underframe without requiring tools or tedious alignment steps.
• Integrated Measuring Scale: Features built-in measurement scales for accurate length layout and setup.
• Adjustable Flip Stop: Locks in position to allow fast, accurate, and repeatable length cuts across multiple workpieces.
• Flexible Leg Deployment: Support legs fold out for elevated underframe setups or retract for direct ground placement when operating without an underframe.
• Compact Transport Profile: Retracts and folds down quickly to facilitate safe, space-saving storage and transport.

What's Included

• Left Extension Wing (KA-UG-L / 497 353)
• Right Extension Wing (KA-UG-R / 497 352)
• Adjustable Flip Stop
• Telescopic Slide-Out Measuring Scale
• Fold-Out Support Legs

Select the KA-UG-KS 120 R/L/D Extension Set (578921) for Festool KAPEX KS 120 and KS 120 REB miter saws used in conjunction with the UG-KAPEX KS 120 Underframe. For Festool KAPEX KS 60 or KSC 60 miter saws used with the UG-KAPEX KS 60 Adapter Base, select the KA-UG-KS 60 R/L/D Extension Set (578920).

Shipping: Beaver Industrial Supply offers free shipping on orders over $199, with the exception of Sawstop and Laguna, which require additional fees to be collected. Other exceptions apply as noted on product pages.

We reserve the right to determine the fastest and most cost-effective manner of transportation for all orders that qualify for free shipping. Our shipping carriers cannot deliver to PO box or U.S. military post office box addresses, such as APO and FPO, so we require a physical street address for delivery. We use USPS, which typically takes 2-8 days for delivery, depending on your location, for smaller items and UPS Ground for all other ground shipments under 150 pounds.

• Returns: We accept returns and exchanges for a fee up to 30 days in unopened, new, and unused condition in the original packaging. Exceptions apply.

Please note, NO REFUNDS will be given on any new, used, or damaged item if it is not returned in the original packaging, no matter what condition the packaging is in. If the item qualifies for free shipping, you will be charged the original shipping cost and are responsible for shipping the product back with the shipping carrier of your choice.

We must receive the item undamaged. We recommend you package it accordingly and purchase insurance for higher-priced items to ensure you receive the full refund minus any incurred fees as applicable. We reserve the right to refuse the return of accessories.

Because items are your responsibility until they reach us, we recommend that you send the parcel using a delivery service that insures you of the value of the goods. Return shipping is at the customer's cost. At Beaver Industrial Supply’s discretion, delivery charges can be refunded if the goods are defective.

Returns require a return authorization number. Please call customer service at 314-773-5999 or submit a customer service inquiry to start the exchange or return process and receive an authorization number.

Machinery too large for parcel shipment (palletized or crated) is only returnable if there is a material defect that cannot be resolved by replacing components.