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4" Diamond Combination Sharpener features coarse and fine grit sharpening surfaces. The coarse diamond stone easily sharpens dull or damaged knives and the fine diamond stone puts a final razor-sharp edge on your knives and tools. These surfaces contain multiple layers of micron-sized monocrystalline diamonds and a unique sharpening surface with an interrupted surface hole design. This innovation speeds sharpening collecting and holding the metal filings which ordinarily build up during the sharpening process. Each stone has a "micro-tool sharpening pad" and a sharpening groove for fish hooks or pointed tools. The soft grip rubber handle is designed to make sharpening safe and easy, and when you are finished sharpening, you can store your stones in the handle for safekeeping.
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.