Spiked Surgical Screw Washer is available in various specifications with diameter size ranging 13.5 mm to 4.0 mm or 5.6 mm. The Screw Washer is designed to wash cancellous bone screw used as a surgical instrument. The Screw Washer is made using medical grade materials to ensure safety of usage. The Spiked Surgical Screw Washer is suitable or use with 4.0 mm or 6.5 mm bone screw.