Introduction
Thank you for choosing The Sharper Image 378 Stainless Steel 3-in-1 Adjustable Mandoline Slicer. This manual provides essential information for the safe and effective use of your new kitchen tool. Please read it thoroughly before first use and retain it for future reference.
This versatile mandoline slicer is designed for efficient and precise slicing of various fruits and vegetables. Its adjustable settings allow for different slicing thicknesses and julienne cuts, making food preparation easier and faster.
Safety Information
WARNING: The blades of this mandoline slicer are extremely sharp. Exercise extreme caution during assembly, use, cleaning, and storage to prevent injury.
- Always use the provided food holder to protect your fingers when slicing. Never attempt to slice food directly with your bare hands.
- Keep fingers and hands away from the blade area during operation.
- Ensure the mandoline is placed on a stable, non-slip surface before use. The non-skid feet help maintain stability.
- Keep out of reach of children.
- Do not force food through the slicer. If resistance is met, check for obstructions or adjust the food item.
- Inspect the mandoline for any damage before each use. Do not use if any parts are broken or damaged.
Components
Your Sharper Image Mandoline Slicer includes the following main components:
- Mandoline Body: The main unit with the slicing blade and adjustable mechanism.
- Food Holder: A safety accessory designed to hold food securely and protect your hands during slicing. It features a spike system for gripping food.
- Adjustable Knob/Dial: Located on the side, this controls the slicing thickness and activates the julienne blades.
- Folding Leg/Stand: Allows the mandoline to stand upright for over-the-bowl or countertop use, or fold down for handheld operation.

Image: The Sharper Image 378 Stainless Steel 3-in-1 Adjustable Mandoline Slicer, showing the main slicing unit and the separate food holder. The main unit is black with stainless steel blades and a folding leg. The food holder is also black with a dome-shaped top and prongs on the underside.
Setup
- Unpack: Carefully remove all components from the packaging.
- Inspect: Check for any signs of damage. If damaged, do not use and contact customer support.
- Clean: Before first use, wash all parts that will come into contact with food. Refer to the "Care and Maintenance" section for cleaning instructions.
- Positioning:
- For over-the-bowl use: Position the mandoline over a bowl, ensuring it is stable.
- For stand-up use: Extend the folding leg until it locks into place, then place the mandoline on a flat, stable surface. The non-skid feet will help secure it.
- For handheld use: Fold the leg down. Hold the mandoline firmly by the handle.
Operating Instructions
- Prepare Food: Wash and peel (if necessary) the food item you wish to slice. Cut larger items to a size that fits comfortably on the slicing surface and under the food holder.
- Adjust Slicing Setting: Turn the adjustable knob on the side of the mandoline to select your desired slicing thickness and style (refer to "Adjusting Slicing Thickness and Style" section).
- Attach Food Holder: Securely place the food item onto the prongs of the food holder. Ensure the food is firmly gripped.
- Begin Slicing: Place the food holder with the food item onto the top of the mandoline's slicing surface. Apply gentle, even pressure downwards and slide the food holder smoothly along the track over the blade. The sliced food will fall below.
- Continue Slicing: Repeat the motion until the food item is fully sliced or until it becomes too small to safely slice with the food holder.
- Safety Reminder: Always use the food holder. Do not attempt to slice the last portion of food if it puts your fingers at risk.
Adjusting Slicing Thickness and Style
The Sharper Image Mandoline Slicer features an adjustable knob to control the slicing output:
- Thickness Adjustment: Rotate the knob to increase or decrease the slicing thickness. The mandoline offers various thickness options. Observe the blade opening as you turn the knob to confirm the desired thickness.
- Julienne Slicing: The knob also controls the activation of the julienne blades. As you turn the knob, the julienne tines will either rise or retract. Ensure the knob is securely locked into the desired position for julienne cuts.
- Locking Mechanism: Some settings may require pulling the knob slightly before rotating to lock it into place. Ensure it is locked to prevent accidental changes during slicing.
Care and Maintenance
Proper care will extend the life of your mandoline slicer.
- Cleaning:
- Hand Wash Only: This product is designed for hand washing. Do not place in a dishwasher.
- Use warm, soapy water and a soft brush to clean the blades and surfaces. Be extremely careful when cleaning the sharp blades.
- Rinse thoroughly under running water.
- Allow all parts to air dry completely before storing.
- Storage: Store the mandoline slicer in a safe place where the blades are protected and out of reach of children. Consider using the original packaging or a blade guard if available.
- Blade Care: The stainless steel blades are designed to retain their sharpness. Avoid contact with abrasive materials or surfaces that could dull or damage the blades.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Food not slicing cleanly or getting stuck. | Blade not sharp enough (unlikely for new product), incorrect slicing technique, food too soft/hard, or blade setting incorrect. |
|
| Food holder slips or doesn't grip food. | Food item too small or irregularly shaped, prongs not fully engaged. |
|
| Mandoline slides on countertop during use. | Surface is wet or slippery, non-skid feet are dirty or damaged. |
|
Specifications
| Brand | The Sharper Image |
| Model Number | 12SS378 |
| Material | Stainless Steel (Blades), Plastic (Body) |
| Color | Black |
| Product Dimensions | 12 x 6 x 3 inches (approximately) |
| Item Weight | 10.4 ounces |
| Operation Mode | Manual |
| Care Instructions | Hand Wash Only |
| UPC | 709996618694, 709996618960 |
Warranty and Support
For information regarding warranty coverage, product support, or to purchase replacement parts, please contact The Sharper Image customer service. Contact details are typically available on the product packaging or the official Sharper Image website.
Please have your model number (12SS378) and purchase date available when contacting support.





