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4-1 Knife Sharpening kits are designed to sharpen any dull or damaged knives and blades. The 3-Stage sharpening process: Stage 1 - Preparation (High grade Diamond rods). This 'roughens' the knife edge to prepare the surface for sharpening. It also soothes any nicks and imperfections that could cause the blade to 'catch' during the sharpening stage (a common problem with 1 and 2 stage pull through sharpening slots which can cause damage to blades). Stage 2 - Sharpening (Hardened Tungsten Steel) - Now pull the blade through slot 2's precision angled tungsten carbide plates to create the perfect sharpened 'V' edge on even the bluntest knife. Stage 3 - Hone (Ceramic Stone Rods) - For final edge honing. It removes any burs and gently polishes the blade edges for a super sharp polish.
On all orders within the US
Carefully selected tech gadgets
256-bit SSL encrypted payments
We accept returns within 30 days of delivery for defective items, transit damage (report within 72 hours with photos), or wrong items received. We do not accept returns for change of mind. Email support@cicontrol.com with your order number and photos to initiate a return.
We accept Visa, Mastercard, Maestro, American Express, JCB, Diners Club, and Discover. All payments are processed securely through Shopify Payments with 256-bit SSL encryption.
Orders are processed within 0–1 business days (Monday–Saturday). Once shipped, standard delivery takes 2–3 business days. Total estimated delivery time is 2–4 business days from the date of purchase. You will receive a tracking number by email once your order ships.
Absolutely. Our store is powered by Shopify, which uses 256-bit SSL encryption and is Level 1 PCI DSS certified — the highest level of payment security available. We never store your full card details on our servers.
You can reach us by email at support@cicontrol.com or by phone at +1 (717) 698-6503, Monday–Saturday, 9:00 AM – 6:00 PM ET. We aim to respond to all inquiries within 1–2 business days.